40400994 has 16 divisors (see below), whose sum is σ = 82681632. Its totient is φ = 13153728.

The previous prime is 40400977. The next prime is 40401001. The reversal of 40400994 is 49900404.

40400994 is nontrivially palindromic in base 16.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 78039 + ... + 78554.

It is an arithmetic number, because the mean of its divisors is an integer number (5167602).

Almost surely, 2^40400994 is an apocalyptic number.

40400994 is an abundant number, since it is smaller than the sum of its proper divisors (42280638).

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

40400994 is a wasteful number, since it uses less digits than its factorization.

40400994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156641.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 40400994 is about 6356.1776249567. The cubic root of 40400994 is about 343.1342084317.

The spelling of 40400994 in words is "forty million, four hundred thousand, nine hundred ninety-four".