78874036 has 6 divisors (see below), whose sum is σ = 138029570. Its totient is φ = 39437016.

The previous prime is 78874007. The next prime is 78874043. The reversal of 78874036 is 63047887.

It can be written as a sum of positive squares in only one way, i.e., 78676900 + 197136 = 8870^2 + 444^2 .

It is a super-2 number, since 2×78874036² = 12442227109858592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78873983 and 78874001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9859251 + ... + 9859258.

Almost surely, 2^78874036 is an apocalyptic number.

It is an amenable number.

78874036 is a deficient number, since it is larger than the sum of its proper divisors (59155534).

78874036 is a wasteful number, since it uses less digits than its factorization.

78874036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19718513 (or 19718511 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 78874036 is about 8881.1055618093. The cubic root of 78874036 is about 428.8558659321.

The spelling of 78874036 in words is "seventy-eight million, eight hundred seventy-four thousand, thirty-six".