102128840 has 48 divisors (see below), whose sum is σ = 252590940. Its totient is φ = 37136000.

The previous prime is 102128839. The next prime is 102128863. The reversal of 102128840 is 48821201.

It can be written as a sum of positive squares in 2 ways, for example, as 97574884 + 4553956 = 9878^2 + 2134^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5711 + ... + 15390.

Almost surely, 2^102128840 is an apocalyptic number.

102128840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102128840 is an abundant number, since it is smaller than the sum of its proper divisors (150462100).

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

102128840 is a wasteful number, since it uses less digits than its factorization.

102128840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21134 (or 21119 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 102128840 is about 10105.8814558652. The cubic root of 102128840 is about 467.4295164789.

The spelling of 102128840 in words is "one hundred two million, one hundred twenty-eight thousand, eight hundred forty".