40815616 has 44 divisors (see below), whose sum is σ = 85187952. Its totient is φ = 19509248.

The previous prime is 40815601. The next prime is 40815617. The reversal of 40815616 is 61651804.

It is not an unprimeable number, because it can be changed into a prime (40815617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22686 + ... + 24418.

Almost surely, 2^40815616 is an apocalyptic number.

40815616 is a gapful number since it is divisible by the number (46) 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 40815616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42593976).

40815616 is an abundant number, since it is smaller than the sum of its proper divisors (44372336).

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

40815616 is a wasteful number, since it uses less digits than its factorization.

40815616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40815616 is about 6388.7100419412. The cubic root of 40815616 is about 344.3040398346.

The spelling of 40815616 in words is "forty million, eight hundred fifteen thousand, six hundred sixteen".