40645554 has 32 divisors (see below), whose sum is σ = 85186944. Its totient is φ = 12904320.

The previous prime is 40645543. The next prime is 40645567. The reversal of 40645554 is 45554604.

40645554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40645554² = 3304122119933832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42724 + ... + 43664.

It is an arithmetic number, because the mean of its divisors is an integer number (2662092).

Almost surely, 2^40645554 is an apocalyptic number.

40645554 is an abundant number, since it is smaller than the sum of its proper divisors (44541390).

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

40645554 is a wasteful number, since it uses less digits than its factorization.

40645554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282.

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 40645554 is about 6375.3865765144. The cubic root of 40645554 is about 343.8251827179.

The spelling of 40645554 in words is "forty million, six hundred forty-five thousand, five hundred fifty-four".