88721020 has 12 divisors (see below), whose sum is σ = 186314184. Its totient is φ = 35488400.

The previous prime is 88720999. The next prime is 88721021. The reversal of 88721020 is 2012788.

It is a self number, because there is not a number n which added to its sum of digits gives 88721020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88721021) 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, 2218006 + ... + 2218045.

It is an arithmetic number, because the mean of its divisors is an integer number (15526182).

Almost surely, 2^88721020 is an apocalyptic number.

It is an amenable number.

88721020 is an abundant number, since it is smaller than the sum of its proper divisors (97593164).

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

88721020 is a wasteful number, since it uses less digits than its factorization.

88721020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436060 (or 4436058 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 88721020 is about 9419.1836164288. The cubic root of 88721020 is about 446.0075139329.

The spelling of 88721020 in words is "eighty-eight million, seven hundred twenty-one thousand, twenty".