30860720 has 40 divisors (see below), whose sum is σ = 78276240. Its totient is φ = 11221760.

The previous prime is 30860719. The next prime is 30860737. The reversal of 30860720 is 2706803.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 30860720.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16655 + ... + 18414.

It is an arithmetic number, because the mean of its divisors is an integer number (1956906).

Almost surely, 2^30860720 is an apocalyptic number.

It is an amenable number.

30860720 is an abundant number, since it is smaller than the sum of its proper divisors (47415520).

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

30860720 is a wasteful number, since it uses less digits than its factorization.

30860720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35093 (or 35087 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30860720 is about 5555.2425689613. The cubic root of 30860720 is about 313.6668949166. Note that the first 3 decimals are identical.

The spelling of 30860720 in words is "thirty million, eight hundred sixty thousand, seven hundred twenty".