40938728 has 8 divisors (see below), whose sum is σ = 76760130. Its totient is φ = 20469360.

The previous prime is 40938719. The next prime is 40938731. The reversal of 40938728 is 82783904.

It can be written as a sum of positive squares in only one way, i.e., 36264484 + 4674244 = 6022^2 + 2162^2 .

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, 2558663 + ... + 2558678.

Almost surely, 2^40938728 is an apocalyptic number.

It is an amenable number.

40938728 is a deficient number, since it is larger than the sum of its proper divisors (35821402).

40938728 is a wasteful number, since it uses less digits than its factorization.

40938728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117347 (or 5117343 counting only the distinct ones).

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

The square root of 40938728 is about 6398.3379091761. The cubic root of 40938728 is about 344.6498667194.

It can be divided in two parts, 4093 and 8728, that added together give a palindrome (12821).

The spelling of 40938728 in words is "forty million, nine hundred thirty-eight thousand, seven hundred twenty-eight".