306500072 has 32 divisors (see below), whose sum is σ = 629483400. Its totient is φ = 139259904.

The previous prime is 306500059. The next prime is 306500111. The reversal of 306500072 is 270005603.

It can be written as a sum of positive squares in 4 ways, for example, as 289476196 + 17023876 = 17014^2 + 4126^2 .

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, 34913 + ... + 42800.

Almost surely, 2^306500072 is an apocalyptic number.

It is an amenable number.

306500072 is an abundant number, since it is smaller than the sum of its proper divisors (322983328).

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

306500072 is a wasteful number, since it uses less digits than its factorization.

306500072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77765 (or 77761 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 306500072 is about 17507.1434563152. The cubic root of 306500072 is about 674.2332927845.

Adding to 306500072 its reverse (270005603), we get a palindrome (576505675).

The spelling of 306500072 in words is "three hundred six million, five hundred thousand, seventy-two".