1028779045902 has 32 divisors (see below), whose sum is σ = 2286308772000. Its totient is φ = 342906381504.

The previous prime is 1028779045901. The next prime is 1028779045933. The reversal of 1028779045902 is 2095409778201.

1028779045902 is a `hidden beast` number, since 10 + 28 + 77 + 90 + 459 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028779045901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396328 + ... + 1488164.

It is an arithmetic number, because the mean of its divisors is an integer number (71447149125).

Almost surely, 2^{1028779045902} is an apocalyptic number.

1028779045902 is an abundant number, since it is smaller than the sum of its proper divisors (1257529726098).

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

1028779045902 is a wasteful number, since it uses less digits than its factorization.

1028779045902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109297 (or 1109291 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 1028779045902 in words is "one trillion, twenty-eight billion, seven hundred seventy-nine million, forty-five thousand, nine hundred two".