73775636 has 18 divisors (see below), whose sum is σ = 141912330. Its totient is φ = 33534160.

The previous prime is 73775633. The next prime is 73775683. The reversal of 73775636 is 63657737.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59290000 + 14485636 = 7700^2 + 3806^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73775633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75731 + ... + 76698.

Almost surely, 2^73775636 is an apocalyptic number.

It is an amenable number.

73775636 is a deficient number, since it is larger than the sum of its proper divisors (68136694).

73775636 is a wasteful number, since it uses less digits than its factorization.

73775636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152455 (or 152442 counting only the distinct ones).

The product of its digits is 555660, while the sum is 44.

The square root of 73775636 is about 8589.2744745991. The cubic root of 73775636 is about 419.4089115281.

The spelling of 73775636 in words is "seventy-three million, seven hundred seventy-five thousand, six hundred thirty-six".