78339648 has 28 divisors (see below), whose sum is σ = 207274160. Its totient is φ = 26113152.

The previous prime is 78339631. The next prime is 78339713. The reversal of 78339648 is 84693387.

It is a super-2 number, since 2×78339648² = 12274200897527808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 78339597 and 78339606.

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, 203818 + ... + 204201.

Almost surely, 2^78339648 is an apocalyptic number.

It is an amenable number.

78339648 is an abundant number, since it is smaller than the sum of its proper divisors (128934512).

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

78339648 is a wasteful number, since it uses less digits than its factorization.

78339648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408034 (or 408024 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 78339648 is about 8850.9687605369. The cubic root of 78339648 is about 427.8851411009.

It can be divided in two parts, 78339 and 648, that added together give a palindrome (78987).

The spelling of 78339648 in words is "seventy-eight million, three hundred thirty-nine thousand, six hundred forty-eight".