306997644 has 24 divisors (see below), whose sum is σ = 717011568. Its totient is φ = 102234880.

The previous prime is 306997637. The next prime is 306997657. The reversal of 306997644 is 446799603.

It is a junction number, because it is equal to n+sod(n) for n = 306997593 and 306997602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504 + ... + 24824.

It is an arithmetic number, because the mean of its divisors is an integer number (29875482).

Almost surely, 2^306997644 is an apocalyptic number.

It is an amenable number.

306997644 is an abundant number, since it is smaller than the sum of its proper divisors (410013924).

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

306997644 is a wasteful number, since it uses less digits than its factorization.

306997644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24425 (or 24423 counting only the distinct ones).

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

The square root of 306997644 is about 17521.3482357951. The cubic root of 306997644 is about 674.5979454801.

The spelling of 306997644 in words is "three hundred six million, nine hundred ninety-seven thousand, six hundred forty-four".