309369977028 has 72 divisors (see below), whose sum is σ = 894814182080. Its totient is φ = 88284738240.

The previous prime is 309369977027. The next prime is 309369977051. The reversal of 309369977028 is 820779963903.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (309369977023) 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, 531538 + ... + 949353.

Almost surely, 2^309369977028 is an apocalyptic number.

It is an amenable number.

309369977028 is an abundant number, since it is smaller than the sum of its proper divisors (585444205052).

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

309369977028 is a wasteful number, since it uses less digits than its factorization.

309369977028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481737 (or 1481732 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 63.

The spelling of 309369977028 in words is "three hundred nine billion, three hundred sixty-nine million, nine hundred seventy-seven thousand, twenty-eight".