78315898 has 8 divisors (see below), whose sum is σ = 119227392. Its totient is φ = 38573436.

The previous prime is 78315883. The next prime is 78315899. The reversal of 78315898 is 89851387.

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

It is a super-2 number, since 2×78315898² = 12266759759092808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78315899) 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, 292090 + ... + 292357.

It is an arithmetic number, because the mean of its divisors is an integer number (14903424).

Almost surely, 2^78315898 is an apocalyptic number.

78315898 is a deficient number, since it is larger than the sum of its proper divisors (40911494).

78315898 is a wasteful number, since it uses less digits than its factorization.

78315898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584516.

The product of its digits is 483840, while the sum is 49.

The square root of 78315898 is about 8849.6269977892. The cubic root of 78315898 is about 427.8418965051.

The spelling of 78315898 in words is "seventy-eight million, three hundred fifteen thousand, eight hundred ninety-eight".