102799820 has 24 divisors (see below), whose sum is σ = 218021328. Its totient is φ = 40712000.

The previous prime is 102799819. The next prime is 102799847. The reversal of 102799820 is 28997201.

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 7 ways as a sum of consecutive naturals, for example, 23426 + ... + 27465.

It is an arithmetic number, because the mean of its divisors is an integer number (9084222).

Almost surely, 2^102799820 is an apocalyptic number.

102799820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102799820 is an abundant number, since it is smaller than the sum of its proper divisors (115221508).

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

102799820 is a wasteful number, since it uses less digits than its factorization.

102799820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51001 (or 50999 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 102799820 is about 10139.0246079196. The cubic root of 102799820 is about 468.4509435872.

The spelling of 102799820 in words is "one hundred two million, seven hundred ninety-nine thousand, eight hundred twenty".