74564490 has 192 divisors, whose sum is σ = 242860032. Its totient is φ = 14227200.

The previous prime is 74564473. The next prime is 74564521. The reversal of 74564490 is 9446547.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 390295 + ... + 390485.

It is an arithmetic number, because the mean of its divisors is an integer number (1264896).

Almost surely, 2^74564490 is an apocalyptic number.

74564490 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 74564490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121430016).

74564490 is an abundant number, since it is smaller than the sum of its proper divisors (168295542).

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

74564490 is a wasteful number, since it uses less digits than its factorization.

74564490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 74564490 is about 8635.0732480970. The cubic root of 74564490 is about 420.8984734204.

The spelling of 74564490 in words is "seventy-four million, five hundred sixty-four thousand, four hundred ninety".