78334425 has 96 divisors (see below), whose sum is σ = 158323200. Its totient is φ = 37739520.

The previous prime is 78334393. The next prime is 78334441. The reversal of 78334425 is 52443387.

It is a happy number.

It is not a de Polignac number, because 78334425 - 2⁵ = 78334393 is a prime.

It is a super-2 number, since 2×78334425² = 12272564280161250, which contains 22 as substring.

Its product of digits (80640) is a multiple of the sum of its prime factors (224).

It is a self number, because there is not a number n which added to its sum of digits gives 78334425.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 693169 + ... + 693281.

It is an arithmetic number, because the mean of its divisors is an integer number (1649200).

Almost surely, 2^78334425 is an apocalyptic number.

78334425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78334425 is an abundant number, since it is smaller than the sum of its proper divisors (79988775).

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

78334425 is a wasteful number, since it uses less digits than its factorization.

78334425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 213 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 78334425 is about 8850.6737031708. The cubic root of 78334425 is about 427.8756316812.

The spelling of 78334425 in words is "seventy-eight million, three hundred thirty-four thousand, four hundred twenty-five".