102720828 has 48 divisors (see below), whose sum is σ = 278426624. Its totient is φ = 28866240.

The previous prime is 102720823. The next prime is 102720833. The reversal of 102720828 is 828027201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102720823) and next prime (102720833).

It is a junction number, because it is equal to n+sod(n) for n = 102720795 and 102720804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102720823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4900 + ... + 15147.

Almost surely, 2^102720828 is an apocalyptic number.

It is an amenable number.

102720828 is an abundant number, since it is smaller than the sum of its proper divisors (175705796).

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

102720828 is a wasteful number, since it uses less digits than its factorization.

102720828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122 (or 20120 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 102720828 is about 10135.1284155653. The cubic root of 102720828 is about 468.3309260003.

The spelling of 102720828 in words is "one hundred two million, seven hundred twenty thousand, eight hundred twenty-eight".