306731949 has 8 divisors (see below), whose sum is σ = 422168832. Its totient is φ = 197891520.

The previous prime is 306731923. The next prime is 306731951. The reversal of 306731949 is 949137603.

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

It is not a de Polignac number, because 306731949 - 2⁸ = 306731693 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 306731949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306731959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649004 + ... + 1649189.

It is an arithmetic number, because the mean of its divisors is an integer number (52771104).

Almost surely, 2^306731949 is an apocalyptic number.

It is an amenable number.

306731949 is a deficient number, since it is larger than the sum of its proper divisors (115436883).

306731949 is a wasteful number, since it uses less digits than its factorization.

306731949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298227.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 306731949 is about 17513.7645581982. The cubic root of 306731949 is about 674.4032761971.

The spelling of 306731949 in words is "three hundred six million, seven hundred thirty-one thousand, nine hundred forty-nine".