40520988 has 36 divisors (see below), whose sum is σ = 103587120. Its totient is φ = 13354176.

The previous prime is 40520983. The next prime is 40520993. The reversal of 40520988 is 88902504.

40520988 is a `hidden beast` number, since 40 + 520 + 98 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (40520983) and next prime (40520993).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×40520988² = 3283900936992288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3120 + ... + 9527.

It is an arithmetic number, because the mean of its divisors is an integer number (2877420).

Almost surely, 2^40520988 is an apocalyptic number.

It is an amenable number.

40520988 is an abundant number, since it is smaller than the sum of its proper divisors (63066132).

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

40520988 is a wasteful number, since it uses less digits than its factorization.

40520988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746 (or 12741 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 40520988 is about 6365.6097901144. The cubic root of 40520988 is about 343.4735841575.

The spelling of 40520988 in words is "forty million, five hundred twenty thousand, nine hundred eighty-eight".