30745680 has 80 divisors (see below), whose sum is σ = 108933504. Its totient is φ = 7027200.

The previous prime is 30745669. The next prime is 30745691. The reversal of 30745680 is 8654703.

It is an interprime number because it is at equal distance from previous prime (30745669) and next prime (30745691).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7471 + ... + 10830.

Almost surely, 2^30745680 is an apocalyptic number.

30745680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30745680 is an abundant number, since it is smaller than the sum of its proper divisors (78187824).

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

30745680 is a wasteful number, since it uses less digits than its factorization.

30745680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18324 (or 18318 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 30745680 is about 5544.8787182408. The cubic root of 30745680 is about 313.2766559122.

The spelling of 30745680 in words is "thirty million, seven hundred forty-five thousand, six hundred eighty".