78344325 has 36 divisors (see below), whose sum is σ = 146434080. Its totient is φ = 39964320.

The previous prime is 78344309. The next prime is 78344351. The reversal of 78344325 is 52344387.

It is a happy number.

It is not a de Polignac number, because 78344325 - 2⁴ = 78344309 is a prime.

It is a super-2 number, since 2×78344325² = 12275666519411250, 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 78344325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2395 + ... + 12744.

Almost surely, 2^78344325 is an apocalyptic number.

78344325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78344325 is a deficient number, since it is larger than the sum of its proper divisors (68089755).

78344325 is a wasteful number, since it uses less digits than its factorization.

78344325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15178 (or 15170 counting only the distinct ones).

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

The square root of 78344325 is about 8851.2329649603. The cubic root of 78344325 is about 427.8936560697.

The spelling of 78344325 in words is "seventy-eight million, three hundred forty-four thousand, three hundred twenty-five".