40021104 has 40 divisors (see below), whose sum is σ = 107885952. Its totient is φ = 12760000.

The previous prime is 40021061. The next prime is 40021117. The reversal of 40021104 is 40112004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 40021104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17022 + ... + 19229.

Almost surely, 2^40021104 is an apocalyptic number.

It is an amenable number.

40021104 is an abundant number, since it is smaller than the sum of its proper divisors (67864848).

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

40021104 is a wasteful number, since it uses less digits than its factorization.

40021104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36285 (or 36279 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 40021104 is about 6326.2235180240. The cubic root of 40021104 is about 342.0553243148.

Adding to 40021104 its reverse (40112004), we get a palindrome (80133108).

The spelling of 40021104 in words is "forty million, twenty-one thousand, one hundred four".