102104840 has 16 divisors (see below), whose sum is σ = 229735980. Its totient is φ = 40841920.

The previous prime is 102104837. The next prime is 102104861. The reversal of 102104840 is 48401201.

It can be written as a sum of positive squares in 2 ways, for example, as 101566084 + 538756 = 10078^2 + 734^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276271 + ... + 1276350.

Almost surely, 2^102104840 is an apocalyptic number.

102104840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102104840 is an abundant number, since it is smaller than the sum of its proper divisors (127631140).

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

102104840 is a wasteful number, since it uses less digits than its factorization.

102104840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552632 (or 2552628 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 102104840 is about 10104.6939587501. The cubic root of 102104840 is about 467.3928987215.

The spelling of 102104840 in words is "one hundred two million, one hundred four thousand, eight hundred forty".