40400907 has 4 divisors (see below), whose sum is σ = 53867880. Its totient is φ = 26933936.

The previous prime is 40400887. The next prime is 40400911. The reversal of 40400907 is 70900404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40400907 - 2¹⁴ = 40384523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40400977) by changing a digit.

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, 6733482 + ... + 6733487.

It is an arithmetic number, because the mean of its divisors is an integer number (13466970).

Almost surely, 2^40400907 is an apocalyptic number.

40400907 is a deficient number, since it is larger than the sum of its proper divisors (13466973).

40400907 is a wasteful number, since it uses less digits than its factorization.

40400907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13466972.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 40400907 is about 6356.1707812173. The cubic root of 40400907 is about 343.1339621283.

The spelling of 40400907 in words is "forty million, four hundred thousand, nine hundred seven".