102138834 has 24 divisors (see below), whose sum is σ = 237629808. Its totient is φ = 29182440.

The previous prime is 102138821. The next prime is 102138857. The reversal of 102138834 is 438831201.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173412 + ... + 173999.

It is an arithmetic number, because the mean of its divisors is an integer number (9901242).

Almost surely, 2^102138834 is an apocalyptic number.

102138834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

102138834 is an abundant number, since it is smaller than the sum of its proper divisors (135490974).

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

102138834 is a wasteful number, since it uses less digits than its factorization.

102138834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347430 (or 347423 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 102138834 is about 10106.3759083066. The cubic root of 102138834 is about 467.4447630316. Note that the first 3 decimals are identical.

The spelling of 102138834 in words is "one hundred two million, one hundred thirty-eight thousand, eight hundred thirty-four".