102781140 has 96 divisors (see below), whose sum is σ = 358815744. Its totient is φ = 21356160.

The previous prime is 102781139. The next prime is 102781163. The reversal of 102781140 is 41187201.

It is a self number, because there is not a number n which added to its sum of digits gives 102781140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6504 + ... + 15743.

It is an arithmetic number, because the mean of its divisors is an integer number (3737664).

Almost surely, 2^102781140 is an apocalyptic number.

102781140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102781140 is an abundant number, since it is smaller than the sum of its proper divisors (256034604).

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

102781140 is a wasteful number, since it uses less digits than its factorization.

102781140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22277 (or 22275 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 102781140 is about 10138.1033729194. The cubic root of 102781140 is about 468.4225674230.

The spelling of 102781140 in words is "one hundred two million, seven hundred eighty-one thousand, one hundred forty".