1390392 has 64 divisors (see below), whose sum is σ = 3981600. Its totient is φ = 449280.

The previous prime is 1390391. The next prime is 1390399. The reversal of 1390392 is 2930931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8778 + ... + 8934.

2^1390392 is an apocalyptic number.

1390392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990800).

1390392 is an abundant number, since it is smaller than the sum of its proper divisors (2591208).

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

1390392 is a wasteful number, since it uses less digits than its factorization.

1390392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 1390392 is about 1179.1488455662. The cubic root of 1390392 is about 111.6123931202.

The spelling of 1390392 in words is "one million, three hundred ninety thousand, three hundred ninety-two".