40183840 has 24 divisors (see below), whose sum is σ = 94934700. Its totient is φ = 16073472.

The previous prime is 40183837. The next prime is 40183849. The reversal of 40183840 is 4838104.

It can be written as a sum of positive squares in 2 ways, for example, as 39388176 + 795664 = 6276^2 + 892^2 .

It is a super-2 number, since 2×40183840² = 3229481994291200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40183799 and 40183808.

It is not an unprimeable number, because it can be changed into a prime (40183849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125415 + ... + 125734.

Almost surely, 2^40183840 is an apocalyptic number.

40183840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40183840 is an abundant number, since it is smaller than the sum of its proper divisors (54750860).

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

40183840 is a wasteful number, since it uses less digits than its factorization.

40183840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251164 (or 251156 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 40183840 is about 6339.0724873596. The cubic root of 40183840 is about 342.5183253377.

The spelling of 40183840 in words is "forty million, one hundred eighty-three thousand, eight hundred forty".