40478994 has 32 divisors (see below), whose sum is σ = 92858880. Its totient is φ = 13057200.

The previous prime is 40478959. The next prime is 40479031. The reversal of 40478994 is 49987404.

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 15 ways as a sum of consecutive naturals, for example, 10417 + ... + 13764.

It is an arithmetic number, because the mean of its divisors is an integer number (2901840).

Almost surely, 2^40478994 is an apocalyptic number.

40478994 is an abundant number, since it is smaller than the sum of its proper divisors (52379886).

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

40478994 is a wasteful number, since it uses less digits than its factorization.

40478994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24223 (or 24217 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 40478994 is about 6362.3104293959. The cubic root of 40478994 is about 343.3548899861.

It can be divided in two parts, 4047 and 8994, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 40478994 in words is "forty million, four hundred seventy-eight thousand, nine hundred ninety-four".