40255668 has 36 divisors (see below), whose sum is σ = 102342240. Its totient is φ = 13341456.

The previous prime is 40255637. The next prime is 40255687. The reversal of 40255668 is 86655204.

40255668 is a `hidden beast` number, since 40 + 2 + 556 + 68 = 666.

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

It is a super-2 number, since 2×40255668² = 3241037612252448, 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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3321 + ... + 9567.

It is an arithmetic number, because the mean of its divisors is an integer number (2842840).

Almost surely, 2^40255668 is an apocalyptic number.

It is an amenable number.

40255668 is an abundant number, since it is smaller than the sum of its proper divisors (62086572).

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

40255668 is a wasteful number, since it uses less digits than its factorization.

40255668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6436 (or 6431 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 40255668 is about 6344.7354554780. The cubic root of 40255668 is about 342.7222859514.

The spelling of 40255668 in words is "forty million, two hundred fifty-five thousand, six hundred sixty-eight".