40656890 has 16 divisors (see below), whose sum is σ = 73307808. Its totient is φ = 16234896.

The previous prime is 40656857. The next prime is 40656899. The reversal of 40656890 is 9865604.

It is a super-3 number, since 3×40656890³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40656899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3269 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (4581738).

Almost surely, 2^40656890 is an apocalyptic number.

40656890 is a deficient number, since it is larger than the sum of its proper divisors (32650918).

40656890 is a wasteful number, since it uses less digits than its factorization.

40656890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6973.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 40656890 is about 6376.2755586628. The cubic root of 40656890 is about 343.8571439010.

The spelling of 40656890 in words is "forty million, six hundred fifty-six thousand, eight hundred ninety".