306997980 has 48 divisors (see below), whose sum is σ = 867646080. Its totient is φ = 81099328.

The previous prime is 306997979. The next prime is 306998009. The reversal of 306997980 is 89799603.

It is a congruent number.

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, 17490 + ... + 30329.

It is an arithmetic number, because the mean of its divisors is an integer number (18075960).

Almost surely, 2^306997980 is an apocalyptic number.

306997980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

306997980 is an abundant number, since it is smaller than the sum of its proper divisors (560648100).

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

306997980 is a wasteful number, since it uses less digits than its factorization.

306997980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47938 (or 47936 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 306997980 is about 17521.3578240957. The cubic root of 306997980 is about 674.5981915893.

The spelling of 306997980 in words is "three hundred six million, nine hundred ninety-seven thousand, nine hundred eighty".