102989920 has 96 divisors (see below), whose sum is σ = 267805440. Its totient is φ = 37117440.

The previous prime is 102989917. The next prime is 102989941. The reversal of 102989920 is 29989201.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286701 + ... + 287059.

It is an arithmetic number, because the mean of its divisors is an integer number (2789640).

Almost surely, 2^102989920 is an apocalyptic number.

102989920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102989920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133902720).

102989920 is an abundant number, since it is smaller than the sum of its proper divisors (164815520).

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

102989920 is a wasteful number, since it uses less digits than its factorization.

102989920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 102989920 is about 10148.3949469855. The cubic root of 102989920 is about 468.7395228473.

The spelling of 102989920 in words is "one hundred two million, nine hundred eighty-nine thousand, nine hundred twenty".