88821810 has 144 divisors (see below), whose sum is σ = 293222592. Its totient is φ = 18446400.

The previous prime is 88821767. The next prime is 88821823. The reversal of 88821810 is 1812888.

It is a happy number.

It is a super-2 number, since 2×88821810² = 15778627863352200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 47595 + ... + 49425.

It is an arithmetic number, because the mean of its divisors is an integer number (2036268).

Almost surely, 2^88821810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88821810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146611296).

88821810 is an abundant number, since it is smaller than the sum of its proper divisors (204400782).

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

88821810 is a wasteful number, since it uses less digits than its factorization.

88821810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869 (or 1859 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The square root of 88821810 is about 9424.5323491407. The cubic root of 88821810 is about 446.1763430910.

The spelling of 88821810 in words is "eighty-eight million, eight hundred twenty-one thousand, eight hundred ten".