102381138 has 32 divisors (see below), whose sum is σ = 228486720. Its totient is φ = 33981120.

The previous prime is 102381137. The next prime is 102381179. The reversal of 102381138 is 831183201.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (102381133) 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, 9081 + ... + 16947.

It is an arithmetic number, because the mean of its divisors is an integer number (7140210).

Almost surely, 2^102381138 is an apocalyptic number.

102381138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

102381138 is an abundant number, since it is smaller than the sum of its proper divisors (126105582).

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

102381138 is a wasteful number, since it uses less digits than its factorization.

102381138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119 (or 8113 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 102381138 is about 10118.3564870981. The cubic root of 102381138 is about 467.8141109217.

The spelling of 102381138 in words is "one hundred two million, three hundred eighty-one thousand, one hundred thirty-eight".