102780928 has 52 divisors (see below), whose sum is σ = 214669728. Its totient is φ = 49111040.

The previous prime is 102780917. The next prime is 102780943. The reversal of 102780928 is 829087201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93663 + ... + 94753.

It is an arithmetic number, because the mean of its divisors is an integer number (4128264).

Almost surely, 2^102780928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102780928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107334864).

102780928 is an abundant number, since it is smaller than the sum of its proper divisors (111888800).

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

102780928 is an equidigital number, since it uses as much as digits as its factorization.

102780928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 102780928 is about 10138.0929173094. The cubic root of 102780928 is about 468.4222453612.

The spelling of 102780928 in words is "one hundred two million, seven hundred eighty thousand, nine hundred twenty-eight".