40618864 has 80 divisors (see below), whose sum is σ = 94931424. Its totient is φ = 16588800.

The previous prime is 40618861. The next prime is 40618891. The reversal of 40618864 is 46881604.

It is a super-2 number, since 2×40618864² = 3299784225300992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40618861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93592 + ... + 94024.

Almost surely, 2^40618864 is an apocalyptic number.

40618864 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40618864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47465712).

40618864 is an abundant number, since it is smaller than the sum of its proper divisors (54312560).

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

40618864 is a wasteful number, since it uses less digits than its factorization.

40618864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 40618864 is about 6373.2930263718. The cubic root of 40618864 is about 343.7499083636.

The spelling of 40618864 in words is "forty million, six hundred eighteen thousand, eight hundred sixty-four".