306308640 has 96 divisors (see below), whose sum is σ = 1052606016. Its totient is φ = 74255360.

The previous prime is 306308627. The next prime is 306308699. The reversal of 306308640 is 46803603.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 306308598 and 306308607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23727 + ... + 34286.

It is an arithmetic number, because the mean of its divisors is an integer number (10964646).

Almost surely, 2^306308640 is an apocalyptic number.

306308640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

306308640 is an abundant number, since it is smaller than the sum of its proper divisors (746297376).

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

306308640 is a wasteful number, since it uses less digits than its factorization.

306308640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58042 (or 58034 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 306308640 is about 17501.6753483774. The cubic root of 306308640 is about 674.0928940048.

The spelling of 306308640 in words is "three hundred six million, three hundred eight thousand, six hundred forty".