30500840 has 32 divisors (see below), whose sum is σ = 69461280. Its totient is φ = 12052032.

The previous prime is 30500831. The next prime is 30500849. The reversal of 30500840 is 4800503.

It is an interprime number because it is at equal distance from previous prime (30500831) and next prime (30500849).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (30500849) 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, 1274 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (2170665).

Almost surely, 2^30500840 is an apocalyptic number.

It is an amenable number.

30500840 is an abundant number, since it is smaller than the sum of its proper divisors (38960440).

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

30500840 is a wasteful number, since it uses less digits than its factorization.

30500840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9281 (or 9277 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 30500840 is about 5522.7565580967. The cubic root of 30500840 is about 312.4428567515.

The spelling of 30500840 in words is "thirty million, five hundred thousand, eight hundred forty".