74922840 has 128 divisors (see below), whose sum is σ = 251812800. Its totient is φ = 19814400.

The previous prime is 74922829. The next prime is 74922847. The reversal of 74922840 is 4822947.

It is a super-2 number, since 2×74922840² = 11226863907331200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74922795 and 74922804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74922847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186640 + ... + 187040.

Almost surely, 2^74922840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74922840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125906400).

74922840 is an abundant number, since it is smaller than the sum of its proper divisors (176889960).

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

74922840 is a wasteful number, since it uses less digits than its factorization.

74922840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 74922840 is about 8655.7980567941. The cubic root of 74922840 is about 421.5716624396.

The spelling of 74922840 in words is "seventy-four million, nine hundred twenty-two thousand, eight hundred forty".