74779636 has 6 divisors (see below), whose sum is σ = 130864370. Its totient is φ = 37389816.

The previous prime is 74779631. The next prime is 74779643. The reversal of 74779636 is 63697747.

It can be written as a sum of positive squares in only one way, i.e., 54022500 + 20757136 = 7350^2 + 4556^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74779636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74779631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9347451 + ... + 9347458.

Almost surely, 2^74779636 is an apocalyptic number.

It is an amenable number.

74779636 is a deficient number, since it is larger than the sum of its proper divisors (56084734).

74779636 is a wasteful number, since it uses less digits than its factorization.

74779636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18694913 (or 18694911 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 49.

The square root of 74779636 is about 8647.5219571852. The cubic root of 74779636 is about 421.3029003705.

The spelling of 74779636 in words is "seventy-four million, seven hundred seventy-nine thousand, six hundred thirty-six".