78973828 has 6 divisors (see below), whose sum is σ = 138204206. Its totient is φ = 39486912.

The previous prime is 78973813. The next prime is 78973837. The reversal of 78973828 is 82837987.

It can be written as a sum of positive squares in only one way, i.e., 70862724 + 8111104 = 8418^2 + 2848^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9871725 + ... + 9871732.

Almost surely, 2^78973828 is an apocalyptic number.

It is an amenable number.

78973828 is a deficient number, since it is larger than the sum of its proper divisors (59230378).

78973828 is a wasteful number, since it uses less digits than its factorization.

78973828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19743461 (or 19743459 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 78973828 is about 8886.7220053291. The cubic root of 78973828 is about 429.0366535553.

The spelling of 78973828 in words is "seventy-eight million, nine hundred seventy-three thousand, eight hundred twenty-eight".