78898617 has 40 divisors (see below), whose sum is σ = 135512256. Its totient is φ = 44813088.

The previous prime is 78898613. The next prime is 78898663. The reversal of 78898617 is 71689887.

It is not a de Polignac number, because 78898617 - 2² = 78898613 is a prime.

It is a super-3 number, since 3×78898617³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (78898613) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 128403 + ... + 129015.

Almost surely, 2^78898617 is an apocalyptic number.

It is an amenable number.

78898617 is a deficient number, since it is larger than the sum of its proper divisors (56613639).

78898617 is a wasteful number, since it uses less digits than its factorization.

78898617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 850 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 78898617 is about 8882.4893470243. The cubic root of 78898617 is about 428.9004121126.

The spelling of 78898617 in words is "seventy-eight million, eight hundred ninety-eight thousand, six hundred seventeen".