30920740 has 24 divisors (see below), whose sum is σ = 67757760. Its totient is φ = 11830368.

The previous prime is 30920719. The next prime is 30920749. The reversal of 30920740 is 4702903.

30920740 = T₂₃₉ + T₂₄₀ + ... + T₅₈₃.

It is not an unprimeable number, because it can be changed into a prime (30920749) 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, 33150 + ... + 34069.

It is an arithmetic number, because the mean of its divisors is an integer number (2823240).

Almost surely, 2^30920740 is an apocalyptic number.

It is an amenable number.

30920740 is an abundant number, since it is smaller than the sum of its proper divisors (36837020).

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

30920740 is a wasteful number, since it uses less digits than its factorization.

30920740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67251 (or 67249 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 30920740 is about 5560.6420492601. The cubic root of 30920740 is about 313.8701100428.

The spelling of 30920740 in words is "thirty million, nine hundred twenty thousand, seven hundred forty".