40038684 has 72 divisors (see below), whose sum is σ = 109645200. Its totient is φ = 11337984.

The previous prime is 40038679. The next prime is 40038721. The reversal of 40038684 is 48683004.

It is a congruent number.

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, 87384 + ... + 87840.

It is an arithmetic number, because the mean of its divisors is an integer number (1522850).

Almost surely, 2^40038684 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 40038684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54822600).

40038684 is an abundant number, since it is smaller than the sum of its proper divisors (69606516).

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

40038684 is a wasteful number, since it uses less digits than its factorization.

40038684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 40038684 is about 6327.6128200136. The cubic root of 40038684 is about 342.1054016634.

The spelling of 40038684 in words is "forty million, thirty-eight thousand, six hundred eighty-four".