40194816 has 72 divisors (see below), whose sum is σ = 107923200. Its totient is φ = 13280256.

The previous prime is 40194799. The next prime is 40194857. The reversal of 40194816 is 61849104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152701 + ... + 152963.

Almost surely, 2^40194816 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 40194816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53961600).

40194816 is an abundant number, since it is smaller than the sum of its proper divisors (67728384).

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

40194816 is a wasteful number, since it uses less digits than its factorization.

40194816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 40194816 is about 6339.9381700455. The cubic root of 40194816 is about 342.5495081788.

The spelling of 40194816 in words is "forty million, one hundred ninety-four thousand, eight hundred sixteen".