78838720 has 28 divisors (see below), whose sum is σ = 187735464. Its totient is φ = 31535360.

The previous prime is 78838717. The next prime is 78838723. The reversal of 78838720 is 2783887.

It is an interprime number because it is at equal distance from previous prime (78838717) and next prime (78838723).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78838723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122866 + ... + 123505.

It is an arithmetic number, because the mean of its divisors is an integer number (6704838).

Almost surely, 2^78838720 is an apocalyptic number.

It is an amenable number.

78838720 is an abundant number, since it is smaller than the sum of its proper divisors (108896744).

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

78838720 is a wasteful number, since it uses less digits than its factorization.

78838720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246388 (or 246378 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 78838720 is about 8879.1170732230. The cubic root of 78838720 is about 428.7918493661.

The spelling of 78838720 in words is "seventy-eight million, eight hundred thirty-eight thousand, seven hundred twenty".