102820988 has 12 divisors (see below), whose sum is σ = 181959120. Its totient is φ = 50832672.

The previous prime is 102820987. The next prime is 102820997. The reversal of 102820988 is 889028201.

It is a super-2 number, since 2×102820988² = 21144311146592288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102820987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144056 + ... + 144767.

It is an arithmetic number, because the mean of its divisors is an integer number (15163260).

Almost surely, 2^102820988 is an apocalyptic number.

It is an amenable number.

102820988 is a deficient number, since it is larger than the sum of its proper divisors (79138132).

102820988 is a wasteful number, since it uses less digits than its factorization.

102820988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288916 (or 288914 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 102820988 is about 10140.0684415836. The cubic root of 102820988 is about 468.4830950346.

The spelling of 102820988 in words is "one hundred two million, eight hundred twenty thousand, nine hundred eighty-eight".