74439990 has 48 divisors (see below), whose sum is σ = 199794816. Its totient is φ = 19209600.

The previous prime is 74439979. The next prime is 74440039. The reversal of 74439990 is 9993447.

It is a super-2 number, since 2×74439990² = 11082624222400200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10551 + ... + 16130.

It is an arithmetic number, because the mean of its divisors is an integer number (4162392).

Almost surely, 2^74439990 is an apocalyptic number.

74439990 is an abundant number, since it is smaller than the sum of its proper divisors (125354826).

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

74439990 is a wasteful number, since it uses less digits than its factorization.

74439990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26725 (or 26722 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 74439990 is about 8627.8612645313. The cubic root of 74439990 is about 420.6640854783.

The spelling of 74439990 in words is "seventy-four million, four hundred thirty-nine thousand, nine hundred ninety".