40686984 has 96 divisors (see below), whose sum is σ = 125700120. Its totient is φ = 11778048.

The previous prime is 40686979. The next prime is 40686991. The reversal of 40686984 is 48968604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32148900 + 8538084 = 5670^2 + 2922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14634 + ... + 17190.

Almost surely, 2^40686984 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 40686984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62850060).

40686984 is an abundant number, since it is smaller than the sum of its proper divisors (85013136).

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

40686984 is a wasteful number, since it uses less digits than its factorization.

40686984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2592 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 40686984 is about 6378.6349636893. The cubic root of 40686984 is about 343.9419633478.

The spelling of 40686984 in words is "forty million, six hundred eighty-six thousand, nine hundred eighty-four".