74392290 has 96 divisors (see below), whose sum is σ = 230808960. Its totient is φ = 17000928.

The previous prime is 74392261. The next prime is 74392301. The reversal of 74392290 is 9229347.

It is a super-2 number, since 2×74392290² = 11068425622888200, which contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 10419 + ... + 16041.

It is an arithmetic number, because the mean of its divisors is an integer number (2404260).

Almost surely, 2^74392290 is an apocalyptic number.

74392290 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74392290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115404480).

74392290 is an abundant number, since it is smaller than the sum of its proper divisors (156416670).

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

74392290 is a wasteful number, since it uses less digits than its factorization.

74392290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5653 (or 5640 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 74392290 is about 8625.0965211991. The cubic root of 74392290 is about 420.5742145889.

The spelling of 74392290 in words is "seventy-four million, three hundred ninety-two thousand, two hundred ninety".