309411784272 has 160 divisors (see below), whose sum is σ = 829624650624. Its totient is φ = 99290880000.

The previous prime is 309411784271. The next prime is 309411784387. The reversal of 309411784272 is 272487114903.

It is a super-3 number, since 3×309411784272³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309411784271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69984622 + ... + 69989042.

Almost surely, 2^309411784272 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 309411784272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (414812325312).

309411784272 is an abundant number, since it is smaller than the sum of its proper divisors (520212866352).

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

309411784272 is a wasteful number, since it uses less digits than its factorization.

309411784272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877 (or 4871 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 309411784272 in words is "three hundred nine billion, four hundred eleven million, seven hundred eighty-four thousand, two hundred seventy-two".