30756428 has 24 divisors (see below), whose sum is σ = 56482272. Its totient is φ = 14626304.

The previous prime is 30756413. The next prime is 30756449. The reversal of 30756428 is 82465703.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 17276 + ... + 18972.

It is an arithmetic number, because the mean of its divisors is an integer number (2353428).

Almost surely, 2^30756428 is an apocalyptic number.

It is an amenable number.

30756428 is a deficient number, since it is larger than the sum of its proper divisors (25725844).

30756428 is a wasteful number, since it uses less digits than its factorization.

30756428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 30756428 is about 5545.8478161594. The cubic root of 30756428 is about 313.3131564896.

The spelling of 30756428 in words is "thirty million, seven hundred fifty-six thousand, four hundred twenty-eight".