77986228 has 12 divisors (see below), whose sum is σ = 137458720. Its totient is φ = 38712312.

The previous prime is 77986217. The next prime is 77986231. The reversal of 77986228 is 82268977.

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, 69576 + ... + 70687.

Almost surely, 2^77986228 is an apocalyptic number.

It is an amenable number.

77986228 is a deficient number, since it is larger than the sum of its proper divisors (59472492).

77986228 is a wasteful number, since it uses less digits than its factorization.

77986228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140406 (or 140404 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 77986228 is about 8830.9811459430. The cubic root of 77986228 is about 427.2407200848.

It can be divided in two parts, 779862 and 28, that multiplied together give a triangular number (21836136 = T₆₆₀₈).

The spelling of 77986228 in words is "seventy-seven million, nine hundred eighty-six thousand, two hundred twenty-eight".