102109870 has 32 divisors (see below), whose sum is σ = 192585600. Its totient is φ = 38927616.

The previous prime is 102109831. The next prime is 102109873. The reversal of 102109870 is 78901201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102109873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20682 + ... + 25138.

It is an arithmetic number, because the mean of its divisors is an integer number (6018300).

Almost surely, 2^102109870 is an apocalyptic number.

102109870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102109870 is a deficient number, since it is larger than the sum of its proper divisors (90475730).

102109870 is a wasteful number, since it uses less digits than its factorization.

102109870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 102109870 is about 10104.9428499126. The cubic root of 102109870 is about 467.4005736684.

The spelling of 102109870 in words is "one hundred two million, one hundred nine thousand, eight hundred seventy".