102806840 has 32 divisors (see below), whose sum is σ = 232860960. Its totient is φ = 40848000.

The previous prime is 102806797. The next prime is 102806857. The reversal of 102806840 is 48608201.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2471 + ... + 14550.

It is an arithmetic number, because the mean of its divisors is an integer number (7276905).

Almost surely, 2^102806840 is an apocalyptic number.

102806840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102806840 is an abundant number, since it is smaller than the sum of its proper divisors (130054120).

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

102806840 is a wasteful number, since it uses less digits than its factorization.

102806840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17183 (or 17179 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 102806840 is about 10139.3707891565. The cubic root of 102806840 is about 468.4616065461.

The spelling of 102806840 in words is "one hundred two million, eight hundred six thousand, eight hundred forty".