102391228 has 24 divisors (see below), whose sum is σ = 195123600. Its totient is φ = 46827648.

The previous prime is 102391217. The next prime is 102391241. The reversal of 102391228 is 822193201.

It is a junction number, because it is equal to n+sod(n) for n = 102391196 and 102391205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21025 + ... + 25432.

It is an arithmetic number, because the mean of its divisors is an integer number (8130150).

Almost surely, 2^102391228 is an apocalyptic number.

It is an amenable number.

102391228 is a deficient number, since it is larger than the sum of its proper divisors (92732372).

102391228 is a wasteful number, since it uses less digits than its factorization.

102391228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46509 (or 46507 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 102391228 is about 10118.8550735743. The cubic root of 102391228 is about 467.8294786265.

The spelling of 102391228 in words is "one hundred two million, three hundred ninety-one thousand, two hundred twenty-eight".