309045821088 has 48 divisors (see below), whose sum is σ = 813569853600. Its totient is φ = 102720089856.

The previous prime is 309045821087. The next prime is 309045821107. The reversal of 309045821088 is 880128540903.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×309045821088² (a number of 24 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (309045821087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4578570 + ... + 4645577.

It is an arithmetic number, because the mean of its divisors is an integer number (16949371950).

Almost surely, 2^309045821088 is an apocalyptic number.

It is an amenable number.

309045821088 is an abundant number, since it is smaller than the sum of its proper divisors (504524032512).

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

309045821088 is a wasteful number, since it uses less digits than its factorization.

309045821088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9224509 (or 9224501 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 309045821088 in words is "three hundred nine billion, forty-five million, eight hundred twenty-one thousand, eighty-eight".