778884028 has 12 divisors (see below), whose sum is σ = 1467896920. Its totient is φ = 359484912.

The previous prime is 778884017. The next prime is 778884089. The reversal of 778884028 is 820488877.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 14978539 = 778884028 / (7 + 7 + 8 + 8 + 8 + 4 + 0 + 2 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7489218 + ... + 7489321.

Almost surely, 2^778884028 is an apocalyptic number.

It is an amenable number.

778884028 is a deficient number, since it is larger than the sum of its proper divisors (689012892).

778884028 is a wasteful number, since it uses less digits than its factorization.

778884028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14978556 (or 14978554 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 52.

The square root of 778884028 is about 27908.4938325235. The cubic root of 778884028 is about 920.0771942158.

The spelling of 778884028 in words is "seven hundred seventy-eight million, eight hundred eighty-four thousand, twenty-eight".