88190881 has 3 divisors (see below), whose sum is σ = 88200273. Its totient is φ = 88181490.

The previous prime is 88190857. The next prime is 88190911. The reversal of 88190881 is 18809188.

The square root of 88190881 is 9391.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 88190881 - 2⁹ = 88190369 is a prime.

It is a super-2 number, since 2×88190881² = 15555262983112322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88190801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4696 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (29400091).

Almost surely, 2^88190881 is an apocalyptic number.

88190881 is the 9391-st square number.

88190881 is the 4696-th centered octagonal number.

It is an amenable number.

88190881 is a deficient number, since it is larger than the sum of its proper divisors (9392).

88190881 is an frugal number, since it uses more digits than its factorization.

88190881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18782 (or 9391 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 43.

The cubic root of 88190881 is about 445.1173885486.

Multiplying 88190881 by its product of nonzero digits (36864), we get a square (3251068637184 = 1803072²).

It can be divided in two parts, 88 and 190881, that added together give a square (190969 = 437²).

The spelling of 88190881 in words is "eighty-eight million, one hundred ninety thousand, eight hundred eighty-one".