78840048 has 160 divisors (see below), whose sum is σ = 244984320. Its totient is φ = 21381120.

The previous prime is 78840043. The next prime is 78840059. The reversal of 78840048 is 84004887.

It is a junction number, because it is equal to n+sod(n) for n = 78839988 and 78840015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78840043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 812736 + ... + 812832.

It is an arithmetic number, because the mean of its divisors is an integer number (1531152).

Almost surely, 2^78840048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78840048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122492160).

78840048 is an abundant number, since it is smaller than the sum of its proper divisors (166144272).

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

78840048 is a wasteful number, since it uses less digits than its factorization.

78840048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 78840048 is about 8879.1918551183. The cubic root of 78840048 is about 428.7942569495.

The spelling of 78840048 in words is "seventy-eight million, eight hundred forty thousand, forty-eight".