36618728 has 16 divisors (see below), whose sum is σ = 68787780. Its totient is φ = 18275328.

The previous prime is 36618721. The next prime is 36618749. The reversal of 36618728 is 82781663.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34550884 + 2067844 = 5878^2 + 1438^2 .

It is not an unprimeable number, because it can be changed into a prime (36618721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650 + ... + 8582.

Almost surely, 2^36618728 is an apocalyptic number.

It is an amenable number.

36618728 is a deficient number, since it is larger than the sum of its proper divisors (32169052).

36618728 is a wasteful number, since it uses less digits than its factorization.

36618728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8516 (or 8512 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 36618728 is about 6051.3410084047. The cubic root of 36618728 is about 332.0736518263.

The spelling of 36618728 in words is "thirty-six million, six hundred eighteen thousand, seven hundred twenty-eight".