30857796 has 18 divisors (see below), whose sum is σ = 78001742. Its totient is φ = 10285920.

The previous prime is 30857777. The next prime is 30857809. The reversal of 30857796 is 69775803.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16112196 + 14745600 = 4014^2 + 3840^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 428545 + ... + 428616.

Almost surely, 2^30857796 is an apocalyptic number.

30857796 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

30857796 is an abundant number, since it is smaller than the sum of its proper divisors (47143946).

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

30857796 is a wasteful number, since it uses less digits than its factorization.

30857796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857171 (or 857166 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 30857796 is about 5554.9793879006. The cubic root of 30857796 is about 313.6569881379.

The spelling of 30857796 in words is "thirty million, eight hundred fifty-seven thousand, seven hundred ninety-six".