40408906 has 16 divisors (see below), whose sum is σ = 62957664. Its totient is φ = 19437264.

The previous prime is 40408889. The next prime is 40408933. The reversal of 40408906 is 60980404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2256 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (3934854).

Almost surely, 2^40408906 is an apocalyptic number.

40408906 is a deficient number, since it is larger than the sum of its proper divisors (22548758).

40408906 is a wasteful number, since it uses less digits than its factorization.

40408906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7125.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40408906 is about 6356.7999811226. The cubic root of 40408906 is about 343.1566064008.

It can be divided in two parts, 40408 and 906, that added together give a palindrome (41314).

The spelling of 40408906 in words is "forty million, four hundred eight thousand, nine hundred six".