40432986 has 64 divisors (see below), whose sum is σ = 100362240. Its totient is φ = 11959920.

The previous prime is 40432963. The next prime is 40432991. The reversal of 40432986 is 68923404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40432986.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24751 + ... + 26333.

It is an arithmetic number, because the mean of its divisors is an integer number (1568160).

Almost surely, 2^40432986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40432986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50181120).

40432986 is an abundant number, since it is smaller than the sum of its proper divisors (59929254).

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

40432986 is a wasteful number, since it uses less digits than its factorization.

40432986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 40432986 is about 6358.6937337790. The cubic root of 40432986 is about 343.2247561486.

The spelling of 40432986 in words is "forty million, four hundred thirty-two thousand, nine hundred eighty-six".