78798985 has 8 divisors (see below), whose sum is σ = 99535680. Its totient is φ = 59721264.

The previous prime is 78798959. The next prime is 78799001. The reversal of 78798985 is 58989787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78798985 - 2⁷ = 78798857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414637 + ... + 414826.

It is an arithmetic number, because the mean of its divisors is an integer number (12441960).

Almost surely, 2^78798985 is an apocalyptic number.

It is an amenable number.

78798985 is a deficient number, since it is larger than the sum of its proper divisors (20736695).

78798985 is a wasteful number, since it uses less digits than its factorization.

78798985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829487.

The product of its digits is 10160640, while the sum is 61.

The square root of 78798985 is about 8876.8792376600. The cubic root of 78798985 is about 428.7197997127.

The spelling of 78798985 in words is "seventy-eight million, seven hundred ninety-eight thousand, nine hundred eighty-five".