40508655 has 32 divisors (see below), whose sum is σ = 71463168. Its totient is φ = 19430400.

The previous prime is 40508647. The next prime is 40508659. The reversal of 40508655 is 55680504.

It is not a de Polignac number, because 40508655 - 2³ = 40508647 is a prime.

It is a super-2 number, since 2×40508655² = 3281902259818050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40508659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14740 + ... + 17270.

It is an arithmetic number, because the mean of its divisors is an integer number (2233224).

Almost surely, 2^40508655 is an apocalyptic number.

40508655 is a deficient number, since it is larger than the sum of its proper divisors (30954513).

40508655 is a wasteful number, since it uses less digits than its factorization.

40508655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 40508655 is about 6364.6409953744. The cubic root of 40508655 is about 343.4387339909.

The spelling of 40508655 in words is "forty million, five hundred eight thousand, six hundred fifty-five".