306639474 has 8 divisors (see below), whose sum is σ = 613278960. Its totient is φ = 102213156.

The previous prime is 306639457. The next prime is 306639479. The reversal of 306639474 is 474936603.

It is a sphenic number, since it is the product of 3 distinct primes.

306639474 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (306639479) 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, 25553284 + ... + 25553295.

It is an arithmetic number, because the mean of its divisors is an integer number (76659870).

Almost surely, 2^306639474 is an apocalyptic number.

306639474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

306639474 is a wasteful number, since it uses less digits than its factorization.

306639474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51106584.

The product of its (nonzero) digits is 326592, while the sum is 42.

The square root of 306639474 is about 17511.1242928602. The cubic root of 306639474 is about 674.3354952876.

The spelling of 306639474 in words is "three hundred six million, six hundred thirty-nine thousand, four hundred seventy-four".