36438728 has 8 divisors (see below), whose sum is σ = 68322630. Its totient is φ = 18219360.

The previous prime is 36438707. The next prime is 36438737. The reversal of 36438728 is 82783463.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 702244 = 5978^2 + 838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2277413 + ... + 2277428.

Almost surely, 2^36438728 is an apocalyptic number.

It is an amenable number.

36438728 is a deficient number, since it is larger than the sum of its proper divisors (31883902).

36438728 is a wasteful number, since it uses less digits than its factorization.

36438728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554847 (or 4554843 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 36438728 is about 6036.4499500948. The cubic root of 36438728 is about 331.5286532444.

The spelling of 36438728 in words is "thirty-six million, four hundred thirty-eight thousand, seven hundred twenty-eight".