30761928 has 24 divisors (see below), whose sum is σ = 83313750. Its totient is φ = 10253952.

The previous prime is 30761917. The next prime is 30761933. The reversal of 30761928 is 82916703.

30761928 is a `hidden beast` number, since 30 + 7 + 619 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24621444 + 6140484 = 4962^2 + 2478^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30761892 and 30761901.

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, 213553 + ... + 213696.

Almost surely, 2^30761928 is an apocalyptic number.

It is an amenable number.

30761928 is an abundant number, since it is smaller than the sum of its proper divisors (52551822).

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

30761928 is a wasteful number, since it uses less digits than its factorization.

30761928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427261 (or 427254 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 30761928 is about 5546.3436604668. The cubic root of 30761928 is about 313.3318313896.

The spelling of 30761928 in words is "thirty million, seven hundred sixty-one thousand, nine hundred twenty-eight".