78493398 has 16 divisors (see below), whose sum is σ = 157346496. Its totient is φ = 26104520.

The previous prime is 78493379. The next prime is 78493417. The reversal of 78493398 is 89339487.

It is an interprime number because it is at equal distance from previous prime (78493379) and next prime (78493417).

It is a super-2 number, since 2×78493398² = 12322427059172808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78493398.

It is a congruent number.

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, 12108 + ... + 17423.

It is an arithmetic number, because the mean of its divisors is an integer number (9834156).

Almost surely, 2^78493398 is an apocalyptic number.

78493398 is an abundant number, since it is smaller than the sum of its proper divisors (78853098).

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

78493398 is a wasteful number, since it uses less digits than its factorization.

78493398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29979.

The product of its digits is 1306368, while the sum is 51.

The square root of 78493398 is about 8859.6499930866. The cubic root of 78493398 is about 428.1648817377.

The spelling of 78493398 in words is "seventy-eight million, four hundred ninety-three thousand, three hundred ninety-eight".