40155668 has 12 divisors (see below), whose sum is σ = 80311392. Its totient is φ = 17209560.

The previous prime is 40155653. The next prime is 40155671. The reversal of 40155668 is 86655104.

It is a happy number.

40155668 is an admirable number.

It is a super-2 number, since 2×40155668² = 3224955345052448, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 717038 + ... + 717093.

It is an arithmetic number, because the mean of its divisors is an integer number (6692616).

Almost surely, 2^40155668 is an apocalyptic number.

It is an amenable number.

40155668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40155668 is a wasteful number, since it uses less digits than its factorization.

40155668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434142 (or 1434140 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 40155668 is about 6336.8500061150. The cubic root of 40155668 is about 342.4382626215.

The spelling of 40155668 in words is "forty million, one hundred fifty-five thousand, six hundred sixty-eight".