30124920 has 64 divisors (see below), whose sum is σ = 103288320. Its totient is φ = 6885504.

The previous prime is 30124909. The next prime is 30124921. The reversal of 30124920 is 2942103.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30124921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17092 + ... + 18771.

It is an arithmetic number, because the mean of its divisors is an integer number (1613880).

Almost surely, 2^30124920 is an apocalyptic number.

30124920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30124920 is an abundant number, since it is smaller than the sum of its proper divisors (73163400).

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

30124920 is a wasteful number, since it uses less digits than its factorization.

30124920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35884 (or 35880 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 30124920 is about 5488.6173122199. The cubic root of 30124920 is about 311.1539372262.

The spelling of 30124920 in words is "thirty million, one hundred twenty-four thousand, nine hundred twenty".