88191720 has 128 divisors (see below), whose sum is σ = 302054400. Its totient is φ = 22871808.

The previous prime is 88191713. The next prime is 88191731. The reversal of 88191720 is 2719188.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38857 + ... + 41063.

It is an arithmetic number, because the mean of its divisors is an integer number (2359800).

Almost surely, 2^88191720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 88191720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151027200).

88191720 is an abundant number, since it is smaller than the sum of its proper divisors (213862680).

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

88191720 is a wasteful number, since it uses less digits than its factorization.

88191720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264 (or 2254 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 88191720 is about 9391.0446703229. The cubic root of 88191720 is about 445.1188000789.

The spelling of 88191720 in words is "eighty-eight million, one hundred ninety-one thousand, seven hundred twenty".