102189770 has 32 divisors (see below), whose sum is σ = 187963200. Its totient is φ = 39989376.

The previous prime is 102189767. The next prime is 102189779. The reversal of 102189770 is 77981201.

It is a self number, because there is not a number n which added to its sum of digits gives 102189770.

It is not an unprimeable number, because it can be changed into a prime (102189779) 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, 223382 + ... + 223838.

It is an arithmetic number, because the mean of its divisors is an integer number (5873850).

Almost surely, 2^102189770 is an apocalyptic number.

102189770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102189770 is a deficient number, since it is larger than the sum of its proper divisors (85773430).

102189770 is a wasteful number, since it uses less digits than its factorization.

102189770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 102189770 is about 10108.8955875506. The cubic root of 102189770 is about 467.5224540484.

The spelling of 102189770 in words is "one hundred two million, one hundred eighty-nine thousand, seven hundred seventy".