40004228 has 24 divisors (see below), whose sum is σ = 76871424. Its totient is φ = 18064800.

The previous prime is 40004203. The next prime is 40004231. The reversal of 40004228 is 82240004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4013 + ... + 9803.

It is an arithmetic number, because the mean of its divisors is an integer number (3202976).

Almost surely, 2^40004228 is an apocalyptic number.

It is an amenable number.

40004228 is a deficient number, since it is larger than the sum of its proper divisors (36867196).

40004228 is a wasteful number, since it uses less digits than its factorization.

40004228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963 (or 5961 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 40004228 is about 6324.8895642533. The cubic root of 40004228 is about 342.0072385413.

It can be divided in two parts, 4000 and 4228, that added together give a palindrome (8228).

The spelling of 40004228 in words is "forty million, four thousand, two hundred twenty-eight".