78780448 has 24 divisors (see below), whose sum is σ = 164223612. Its totient is φ = 37072896.

The previous prime is 78780439. The next prime is 78780469. The reversal of 78780448 is 84408787.

It can be written as a sum of positive squares in 2 ways, for example, as 74166544 + 4613904 = 8612^2 + 2148^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78780398 and 78780407.

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, 71865 + ... + 72952.

Almost surely, 2^78780448 is an apocalyptic number.

It is an amenable number.

78780448 is an abundant number, since it is smaller than the sum of its proper divisors (85443164).

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

78780448 is a wasteful number, since it uses less digits than its factorization.

78780448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144844 (or 144836 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 46.

The square root of 78780448 is about 8875.8350593057. The cubic root of 78780448 is about 428.6861791351.

The spelling of 78780448 in words is "seventy-eight million, seven hundred eighty thousand, four hundred forty-eight".