102781228 has 24 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 46263120.

The previous prime is 102781207. The next prime is 102781229. The reversal of 102781228 is 822187201.

It is a self number, because there is not a number n which added to its sum of digits gives 102781228.

It is not an unprimeable number, because it can be changed into a prime (102781229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6808 + ... + 15871.

It is an arithmetic number, because the mean of its divisors is an integer number (8255520).

Almost surely, 2^102781228 is an apocalyptic number.

It is an amenable number.

102781228 is a deficient number, since it is larger than the sum of its proper divisors (95351252).

102781228 is a wasteful number, since it uses less digits than its factorization.

102781228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22797 (or 22795 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 102781228 is about 10138.1077129808. The cubic root of 102781228 is about 468.4227011089.

The spelling of 102781228 in words is "one hundred two million, seven hundred eighty-one thousand, two hundred twenty-eight".