102172380 has 48 divisors (see below), whose sum is σ = 302914080. Its totient is φ = 25643008.

The previous prime is 102172379. The next prime is 102172391. The reversal of 102172380 is 83271201.

It is a self number, because there is not a number n which added to its sum of digits gives 102172380.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49065 + ... + 51104.

It is an arithmetic number, because the mean of its divisors is an integer number (6310710).

Almost surely, 2^102172380 is an apocalyptic number.

102172380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102172380 is an abundant number, since it is smaller than the sum of its proper divisors (200741700).

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

102172380 is a wasteful number, since it uses less digits than its factorization.

102172380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100198 (or 100196 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 102172380 is about 10108.0354174290. The cubic root of 102172380 is about 467.4959325525.

The spelling of 102172380 in words is "one hundred two million, one hundred seventy-two thousand, three hundred eighty".