40494816 has 120 divisors (see below), whose sum is σ = 126236880. Its totient is φ = 12690432.

The previous prime is 40494803. The next prime is 40494821. The reversal of 40494816 is 61849404.

It is a happy number.

40494816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43605 + ... + 44523.

It is an arithmetic number, because the mean of its divisors is an integer number (1051974).

Almost surely, 2^40494816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40494816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63118440).

40494816 is an abundant number, since it is smaller than the sum of its proper divisors (85742064).

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

40494816 is a wasteful number, since it uses less digits than its factorization.

40494816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 40494816 is about 6363.5537241387. The cubic root of 40494816 is about 343.3996197985.

The spelling of 40494816 in words is "forty million, four hundred ninety-four thousand, eight hundred sixteen".