74744420 has 24 divisors (see below), whose sum is σ = 157126200. Its totient is φ = 29866752.

The previous prime is 74744419. The next prime is 74744431. The reversal of 74744420 is 2444747.

It can be written as a sum of positive squares in 4 ways, for example, as 39413284 + 35331136 = 6278^2 + 5944^2 .

It is a super-2 number, since 2×74744420² = 11173456642272800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34736 + ... + 36824.

It is an arithmetic number, because the mean of its divisors is an integer number (6546925).

Almost surely, 2^74744420 is an apocalyptic number.

It is an amenable number.

74744420 is an abundant number, since it is smaller than the sum of its proper divisors (82381780).

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

74744420 is a wasteful number, since it uses less digits than its factorization.

74744420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887 (or 3885 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 74744420 is about 8645.4855271407. The cubic root of 74744420 is about 421.2367552123.

The spelling of 74744420 in words is "seventy-four million, seven hundred forty-four thousand, four hundred twenty".