102172378 has 32 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 39698160.

The previous prime is 102172361. The next prime is 102172379. The reversal of 102172378 is 873271201.

It is not an unprimeable number, because it can be changed into a prime (102172379) by changing a digit.

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, 76803 + ... + 78121.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^102172378 is an apocalyptic number.

102172378 is a deficient number, since it is larger than the sum of its proper divisors (89428262).

102172378 is a wasteful number, since it uses less digits than its factorization.

102172378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 102172378 is about 10108.0353184979. The cubic root of 102172378 is about 467.4959295021.

The spelling of 102172378 in words is "one hundred two million, one hundred seventy-two thousand, three hundred seventy-eight".