78513798 has 16 divisors (see below), whose sum is σ = 171302976. Its totient is φ = 23792040.

The previous prime is 78513781. The next prime is 78513821. The reversal of 78513798 is 89731587.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594736 + ... + 594867.

It is an arithmetic number, because the mean of its divisors is an integer number (10706436).

Almost surely, 2^78513798 is an apocalyptic number.

78513798 is an abundant number, since it is smaller than the sum of its proper divisors (92789178).

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

78513798 is a wasteful number, since it uses less digits than its factorization.

78513798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189619.

The product of its digits is 423360, while the sum is 48.

The square root of 78513798 is about 8860.8012053087. The cubic root of 78513798 is about 428.2019710863.

The spelling of 78513798 in words is "seventy-eight million, five hundred thirteen thousand, seven hundred ninety-eight".