40344018 has 48 divisors (see below), whose sum is σ = 95341536. Its totient is φ = 11281920.

The previous prime is 40343999. The next prime is 40344037. The reversal of 40344018 is 81044304.

It is an interprime number because it is at equal distance from previous prime (40343999) and next prime (40344037).

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, 9346 + ... + 12962.

It is an arithmetic number, because the mean of its divisors is an integer number (1986282).

Almost surely, 2^40344018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40344018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47670768).

40344018 is an abundant number, since it is smaller than the sum of its proper divisors (54997518).

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

40344018 is a wasteful number, since it uses less digits than its factorization.

40344018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659 (or 3646 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 40344018 is about 6351.6941047251. The cubic root of 40344018 is about 342.9728294627.

The spelling of 40344018 in words is "forty million, three hundred forty-four thousand, eighteen".