40022028 has 18 divisors (see below), whose sum is σ = 101166884. Its totient is φ = 13340664.

The previous prime is 40022011. The next prime is 40022041. The reversal of 40022028 is 82022004.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 40022028.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555826 + ... + 555897.

Almost surely, 2^40022028 is an apocalyptic number.

It is an amenable number.

40022028 is an abundant number, since it is smaller than the sum of its proper divisors (61144856).

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

40022028 is a wasteful number, since it uses less digits than its factorization.

40022028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111733 (or 1111728 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 40022028 is about 6326.2965469538. The cubic root of 40022028 is about 342.0579567317.

The spelling of 40022028 in words is "forty million, twenty-two thousand, twenty-eight".