1389962916 has 72 divisors (see below), whose sum is σ = 3654871584. Its totient is φ = 461894400.

The previous prime is 1389962911. The next prime is 1389962927. The reversal of 1389962916 is 6192699831.

1389962916 is a `hidden beast` number, since 1 + 3 + 8 + 9 + 9 + 629 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1389962911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341091 + ... + 345141.

Almost surely, 2^1389962916 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 1389962916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827435792).

1389962916 is an abundant number, since it is smaller than the sum of its proper divisors (2264908668).

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

1389962916 is a wasteful number, since it uses less digits than its factorization.

1389962916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423 (or 4409 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 1389962916 is about 37282.2064261224. The cubic root of 1389962916 is about 1116.0091050246.

The spelling of 1389962916 in words is "one billion, three hundred eighty-nine million, nine hundred sixty-two thousand, nine hundred sixteen".