40193816 has 32 divisors (see below), whose sum is σ = 85436400. Its totient is φ = 17573760.

The previous prime is 40193773. The next prime is 40193819. The reversal of 40193816 is 61839104.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40193819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8195 + ... + 12146.

Almost surely, 2^40193816 is an apocalyptic number.

It is an amenable number.

40193816 is an abundant number, since it is smaller than the sum of its proper divisors (45242584).

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

40193816 is a wasteful number, since it uses less digits than its factorization.

40193816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20379 (or 20375 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 40193816 is about 6339.8593044326. The cubic root of 40193816 is about 342.5466674116.

The spelling of 40193816 in words is "forty million, one hundred ninety-three thousand, eight hundred sixteen".