40451906 has 32 divisors (see below), whose sum is σ = 68942016. Its totient is φ = 17640000.

The previous prime is 40451903. The next prime is 40451923. The reversal of 40451906 is 60915404.

40451906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (40451903) by changing a digit.

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, 57356 + ... + 58056.

It is an arithmetic number, because the mean of its divisors is an integer number (2154438).

Almost surely, 2^40451906 is an apocalyptic number.

40451906 is a deficient number, since it is larger than the sum of its proper divisors (28490110).

40451906 is a wasteful number, since it uses less digits than its factorization.

40451906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 40451906 is about 6360.1812867245. The cubic root of 40451906 is about 343.2782833995.

The spelling of 40451906 in words is "forty million, four hundred fifty-one thousand, nine hundred six".