40403816 has 8 divisors (see below), whose sum is σ = 75757170. Its totient is φ = 20201904.

The previous prime is 40403771. The next prime is 40403833. The reversal of 40403816 is 61830404.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 12630916 = 5270^2 + 3554^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525231 + ... + 2525246.

Almost surely, 2^40403816 is an apocalyptic number.

It is an amenable number.

40403816 is a deficient number, since it is larger than the sum of its proper divisors (35353354).

40403816 is a wasteful number, since it uses less digits than its factorization.

40403816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050483 (or 5050479 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 40403816 is about 6356.3996098420. The cubic root of 40403816 is about 343.1421975271.

The spelling of 40403816 in words is "forty million, four hundred three thousand, eight hundred sixteen".