74644380 has 36 divisors (see below), whose sum is σ = 226421832. Its totient is φ = 19905120.

The previous prime is 74644351. The next prime is 74644391. The reversal of 74644380 is 8344647.

74644380 is a `hidden beast` number, since 7 + 4 + 644 + 3 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207166 + ... + 207525.

Almost surely, 2^74644380 is an apocalyptic number.

It is an amenable number.

74644380 is an abundant number, since it is smaller than the sum of its proper divisors (151777452).

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

74644380 is a wasteful number, since it uses less digits than its factorization.

74644380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414706 (or 414701 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 74644380 is about 8639.6979113856. The cubic root of 74644380 is about 421.0487396625.

The spelling of 74644380 in words is "seventy-four million, six hundred forty-four thousand, three hundred eighty".