102804140 has 12 divisors (see below), whose sum is σ = 215888736. Its totient is φ = 41121648.

The previous prime is 102804133. The next prime is 102804161. The reversal of 102804140 is 41408201.

It is a super-2 number, since 2×102804140² = 21137382402279200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5140207 = 102804140 / (1 + 0 + 2 + 8 + 0 + 4 + 1 + 4 + 0).

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 3 ways as a sum of consecutive naturals, for example, 2570084 + ... + 2570123.

It is an arithmetic number, because the mean of its divisors is an integer number (17990728).

Almost surely, 2^102804140 is an apocalyptic number.

102804140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102804140 is an abundant number, since it is smaller than the sum of its proper divisors (113084596).

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

102804140 is a wasteful number, since it uses less digits than its factorization.

102804140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140216 (or 5140214 counting only the distinct ones).

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

The square root of 102804140 is about 10139.2376439257. The cubic root of 102804140 is about 468.4575054655.

The spelling of 102804140 in words is "one hundred two million, eight hundred four thousand, one hundred forty".