30517968 has 40 divisors (see below), whose sum is σ = 84904288. Its totient is φ = 9389952.

The previous prime is 30517967. The next prime is 30517969. The reversal of 30517968 is 86971503.

It is an interprime number because it is at equal distance from previous prime (30517967) and next prime (30517969).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30517961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23830 + ... + 25077.

Almost surely, 2^30517968 is an apocalyptic number.

It is an amenable number.

30517968 is an abundant number, since it is smaller than the sum of its proper divisors (54386320).

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

30517968 is a wasteful number, since it uses less digits than its factorization.

30517968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48931 (or 48925 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 30517968 is about 5524.3070153640. The cubic root of 30517968 is about 312.5013307677.

The spelling of 30517968 in words is "thirty million, five hundred seventeen thousand, nine hundred sixty-eight".