40086728 has 16 divisors (see below), whose sum is σ = 81995760. Its totient is φ = 18221200.

The previous prime is 40086727. The next prime is 40086737. The reversal of 40086728 is 82768004.

It is not an unprimeable number, because it can be changed into a prime (40086721) 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, 227678 + ... + 227853.

It is an arithmetic number, because the mean of its divisors is an integer number (5124735).

Almost surely, 2^40086728 is an apocalyptic number.

It is an amenable number.

40086728 is an abundant number, since it is smaller than the sum of its proper divisors (41909032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40086728 is a wasteful number, since it uses less digits than its factorization.

40086728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455548 (or 455544 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 40086728 is about 6331.4080582442. The cubic root of 40086728 is about 342.2421822344.

The spelling of 40086728 in words is "forty million, eighty-six thousand, seven hundred twenty-eight".