30747928 has 16 divisors (see below), whose sum is σ = 60687000. Its totient is φ = 14564736.

The previous prime is 30747923. The next prime is 30747929. The reversal of 30747928 is 82974703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30747923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100993 + ... + 101296.

Almost surely, 2^30747928 is an apocalyptic number.

30747928 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

30747928 is a deficient number, since it is larger than the sum of its proper divisors (29939072).

30747928 is a wasteful number, since it uses less digits than its factorization.

30747928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202314 (or 202310 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 30747928 is about 5545.0814241091. The cubic root of 30747928 is about 313.2842909009.

The spelling of 30747928 in words is "thirty million, seven hundred forty-seven thousand, nine hundred twenty-eight".