88400869 has 4 divisors (see below), whose sum is σ = 88419744. Its totient is φ = 88381996.

The previous prime is 88400861. The next prime is 88400911. The reversal of 88400869 is 96800488.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88400869 - 2³ = 88400861 is a prime.

It is a super-2 number, since 2×88400869² = 15629427279910322, which contains 22 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 (88400861) 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, 3504 + ... + 13750.

It is an arithmetic number, because the mean of its divisors is an integer number (22104936).

Almost surely, 2^88400869 is an apocalyptic number.

It is an amenable number.

88400869 is a deficient number, since it is larger than the sum of its proper divisors (18875).

88400869 is a wasteful number, since it uses less digits than its factorization.

88400869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18874.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 88400869 is about 9402.1736316662. The cubic root of 88400869 is about 445.4703926297.

The spelling of 88400869 in words is "eighty-eight million, four hundred thousand, eight hundred sixty-nine".