88415861 has 4 divisors (see below), whose sum is σ = 93616812. Its totient is φ = 83214912.

The previous prime is 88415849. The next prime is 88415881. The reversal of 88415861 is 16851488.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57668836 + 30747025 = 7594^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 88415861 - 2²⁶ = 21306997 is a prime.

It is a super-4 number, since 4×88415861⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88415801) 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, 2600450 + ... + 2600483.

It is an arithmetic number, because the mean of its divisors is an integer number (23404203).

Almost surely, 2^88415861 is an apocalyptic number.

It is an amenable number.

88415861 is a deficient number, since it is larger than the sum of its proper divisors (5200951).

88415861 is a wasteful number, since it uses less digits than its factorization.

88415861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200950.

The product of its digits is 61440, while the sum is 41.

The square root of 88415861 is about 9402.9708603186. The cubic root of 88415861 is about 445.4955738099.

The spelling of 88415861 in words is "eighty-eight million, four hundred fifteen thousand, eight hundred sixty-one".