74649636 has 18 divisors (see below), whose sum is σ = 188697782. Its totient is φ = 24883200.

The previous prime is 74649629. The next prime is 74649647. The reversal of 74649636 is 63694647.

74649636 is a `hidden beast` number, since 7 + 4 + 6 + 4 + 9 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 36 = 8640^2 + 6^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 74649591 and 74649600.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1036765 + ... + 1036836.

Almost surely, 2^74649636 is an apocalyptic number.

It is an amenable number.

74649636 is an abundant number, since it is smaller than the sum of its proper divisors (114048146).

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

74649636 is a wasteful number, since it uses less digits than its factorization.

74649636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073611 (or 2073606 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 74649636 is about 8640.0020833331. The cubic root of 74649636 is about 421.0586219882.

It can be divided in two parts, 746496 and 36, that multiplied together give a 4-th power (26873856 = 72⁴).

The spelling of 74649636 in words is "seventy-four million, six hundred forty-nine thousand, six hundred thirty-six".