1392230912 has 90 divisors (see below), whose sum is σ = 2985777927. Its totient is φ = 648413184.

The previous prime is 1392230911. The next prime is 1392230933. The reversal of 1392230912 is 2190322931.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 1022976256 + 369254656 = 31984^2 + 19216^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26384.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392230911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14352848 + ... + 14352944.

Almost surely, 2^1392230912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392230912

1392230912 is an abundant number, since it is smaller than the sum of its proper divisors (1593547015).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1392230912 is an frugal number, since it uses more digits than its factorization.

1392230912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1392230912 is about 37312.6106296517. The cubic root of 1392230912 is about 1116.6157707948.

Multiplying 1392230912 by its sum of digits (32), we get a square (44551389184 = 211072²).

1392230912 divided by its sum of digits (32) gives a square (43507216 = 6596²).

Multiplying 1392230912 by its product of nonzero digits (5832), we get a square (8119490678784 = 2849472²).

The spelling of 1392230912 in words is "one billion, three hundred ninety-two million, two hundred thirty thousand, nine hundred twelve".