309057940460 has 12 divisors (see below), whose sum is σ = 649021675008. Its totient is φ = 123623176176.

The previous prime is 309057940459. The next prime is 309057940463. The reversal of 309057940460 is 64049750903.

It is a happy number.

It is a super-2 number, since 2×309057940460² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (309057940463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7726448492 + ... + 7726448531.

It is an arithmetic number, because the mean of its divisors is an integer number (54085139584).

Almost surely, 2^309057940460 is an apocalyptic number.

It is an amenable number.

309057940460 is an abundant number, since it is smaller than the sum of its proper divisors (339963734548).

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

309057940460 is a wasteful number, since it uses less digits than its factorization.

309057940460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15452897032 (or 15452897030 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 309057940460 in words is "three hundred nine billion, fifty-seven million, nine hundred forty thousand, four hundred sixty".