74987220 has 96 divisors (see below), whose sum is σ = 261789696. Its totient is φ = 15580800.

The previous prime is 74987207. The next prime is 74987249. The reversal of 74987220 is 2278947.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3496 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (2726976).

Almost surely, 2^74987220 is an apocalyptic number.

74987220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74987220 is an abundant number, since it is smaller than the sum of its proper divisors (186802476).

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

74987220 is a wasteful number, since it uses less digits than its factorization.

74987220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16261 (or 16259 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 74987220 is about 8659.5161527651. The cubic root of 74987220 is about 421.6923778025.

The spelling of 74987220 in words is "seventy-four million, nine hundred eighty-seven thousand, two hundred twenty".