40637028 has 12 divisors (see below), whose sum is σ = 94819760. Its totient is φ = 13545672.

The previous prime is 40636997. The next prime is 40637039. The reversal of 40637028 is 82073604.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 40636986 and 40637004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693198 + ... + 1693221.

Almost surely, 2^40637028 is an apocalyptic number.

It is an amenable number.

40637028 is an abundant number, since it is smaller than the sum of its proper divisors (54182732).

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

40637028 is a wasteful number, since it uses less digits than its factorization.

40637028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386426 (or 3386424 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40637028 is about 6374.7178761103. The cubic root of 40637028 is about 343.8011402482.

The spelling of 40637028 in words is "forty million, six hundred thirty-seven thousand, twenty-eight".