40851728 has 10 divisors (see below), whose sum is σ = 79150254. Its totient is φ = 20425856.

The previous prime is 40851721. The next prime is 40851743. The reversal of 40851728 is 82715804.

It can be written as a sum of positive squares in only one way, i.e., 40551424 + 300304 = 6368^2 + 548^2 .

It is not an unprimeable number, because it can be changed into a prime (40851721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276601 + ... + 1276632.

Almost surely, 2^40851728 is an apocalyptic number.

It is an amenable number.

40851728 is a deficient number, since it is larger than the sum of its proper divisors (38298526).

40851728 is a wasteful number, since it uses less digits than its factorization.

40851728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553241 (or 2553235 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 40851728 is about 6391.5356527207. The cubic root of 40851728 is about 344.4055519813.

The spelling of 40851728 in words is "forty million, eight hundred fifty-one thousand, seven hundred twenty-eight".