40391084 has 24 divisors (see below), whose sum is σ = 74227440. Its totient is φ = 19204416.

The previous prime is 40391083. The next prime is 40391101. The reversal of 40391084 is 48019304.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (40391081) 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 7 ways as a sum of consecutive naturals, for example, 5174 + ... + 10370.

It is an arithmetic number, because the mean of its divisors is an integer number (3092810).

Almost surely, 2^40391084 is an apocalyptic number.

It is an amenable number.

40391084 is a deficient number, since it is larger than the sum of its proper divisors (33836356).

40391084 is a wasteful number, since it uses less digits than its factorization.

40391084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297 (or 5295 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40391084 is about 6355.3980205806. The cubic root of 40391084 is about 343.1061502270.

The spelling of 40391084 in words is "forty million, three hundred ninety-one thousand, eighty-four".