78398488 has 32 divisors (see below), whose sum is σ = 168343200. Its totient is φ = 33530112.

The previous prime is 78398483. The next prime is 78398533. The reversal of 78398488 is 88489387.

It is a super-2 number, since 2×78398488² = 12292645841372288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78398483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33418 + ... + 35686.

It is an arithmetic number, because the mean of its divisors is an integer number (5260725).

Almost surely, 2^78398488 is an apocalyptic number.

It is an amenable number.

78398488 is an abundant number, since it is smaller than the sum of its proper divisors (89944712).

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

78398488 is a wasteful number, since it uses less digits than its factorization.

78398488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899 (or 2895 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 55.

The square root of 78398488 is about 8854.2920665630. The cubic root of 78398488 is about 427.9922408120.

The spelling of 78398488 in words is "seventy-eight million, three hundred ninety-eight thousand, four hundred eighty-eight".