30808940 has 12 divisors (see below), whose sum is σ = 64698816. Its totient is φ = 12323568.

The previous prime is 30808931. The next prime is 30808949. The reversal of 30808940 is 4980803.

It is an interprime number because it is at equal distance from previous prime (30808931) and next prime (30808949).

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30808897 and 30808906.

It is not an unprimeable number, because it can be changed into a prime (30808949) 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, 770204 + ... + 770243.

It is an arithmetic number, because the mean of its divisors is an integer number (5391568).

Almost surely, 2^30808940 is an apocalyptic number.

It is an amenable number.

30808940 is an abundant number, since it is smaller than the sum of its proper divisors (33889876).

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

30808940 is a wasteful number, since it uses less digits than its factorization.

30808940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540456 (or 1540454 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 30808940 is about 5550.5801498582. The cubic root of 30808940 is about 313.4913668877.

The spelling of 30808940 in words is "thirty million, eight hundred eight thousand, nine hundred forty".