309302734980 has 384 divisors, whose sum is σ = 940835782656. Its totient is φ = 75772569600.

The previous prime is 309302734973. The next prime is 309302734999. The reversal of 309302734980 is 89437203903.

It is a super-2 number, since 2×309302734980² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 555300862 + ... + 555301418.

It is an arithmetic number, because the mean of its divisors is an integer number (2450093184).

Almost surely, 2^309302734980 is an apocalyptic number.

309302734980 is a gapful number since it is divisible by the number (30) 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 309302734980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470417891328).

309302734980 is an abundant number, since it is smaller than the sum of its proper divisors (631533047676).

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

309302734980 is a wasteful number, since it uses less digits than its factorization.

309302734980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 309302734980 in words is "three hundred nine billion, three hundred two million, seven hundred thirty-four thousand, nine hundred eighty".