309029547072 has 224 divisors, whose sum is σ = 868638449664. Its totient is φ = 96758323200.

The previous prime is 309029547061. The next prime is 309029547097. The reversal of 309029547072 is 270745920903.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84966438 + ... + 84970074.

Almost surely, 2^309029547072 is an apocalyptic number.

309029547072 is a gapful number since it is divisible by the number (32) 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 309029547072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434319224832).

309029547072 is an abundant number, since it is smaller than the sum of its proper divisors (559608902592).

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

309029547072 is a wasteful number, since it uses less digits than its factorization.

309029547072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017 (or 4007 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 309029547072 in words is "three hundred nine billion, twenty-nine million, five hundred forty-seven thousand, seventy-two".