102720996 has 72 divisors (see below), whose sum is σ = 302387904. Its totient is φ = 28791360.

The previous prime is 102720979. The next prime is 102721007. The reversal of 102720996 is 699027201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 102720996.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9511 + ... + 17201.

It is an arithmetic number, because the mean of its divisors is an integer number (4199832).

Almost surely, 2^102720996 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 102720996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151193952).

102720996 is an abundant number, since it is smaller than the sum of its proper divisors (199666908).

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

102720996 is a wasteful number, since it uses less digits than its factorization.

102720996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7761 (or 7756 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 102720996 is about 10135.1367035674. The cubic root of 102720996 is about 468.3311813187.

The spelling of 102720996 in words is "one hundred two million, seven hundred twenty thousand, nine hundred ninety-six".