78598340 has 12 divisors (see below), whose sum is σ = 165056556. Its totient is φ = 31439328.

The previous prime is 78598313. The next prime is 78598343. The reversal of 78598340 is 4389587.

It can be written as a sum of positive squares in 2 ways, for example, as 8809024 + 69789316 = 2968^2 + 8354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78598291 and 78598300.

It is not an unprimeable number, because it can be changed into a prime (78598343) 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, 1964939 + ... + 1964978.

It is an arithmetic number, because the mean of its divisors is an integer number (13754713).

Almost surely, 2^78598340 is an apocalyptic number.

It is an amenable number.

78598340 is an abundant number, since it is smaller than the sum of its proper divisors (86458216).

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

78598340 is a wasteful number, since it uses less digits than its factorization.

78598340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3929926 (or 3929924 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 78598340 is about 8865.5704836181. The cubic root of 78598340 is about 428.3556089021.

The spelling of 78598340 in words is "seventy-eight million, five hundred ninety-eight thousand, three hundred forty".