78430025 has 6 divisors (see below), whose sum is σ = 97253262. Its totient is φ = 62744000.

The previous prime is 78430021. The next prime is 78430039. The reversal of 78430025 is 52003487.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 20106256 + 58323769 = 4484^2 + 7637^2 .

It is not a de Polignac number, because 78430025 - 2² = 78430021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78430025.

It is not an unprimeable number, because it can be changed into a prime (78430021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1568576 + ... + 1568625.

It is an arithmetic number, because the mean of its divisors is an integer number (16208877).

Almost surely, 2^78430025 is an apocalyptic number.

It is an amenable number.

78430025 is a deficient number, since it is larger than the sum of its proper divisors (18823237).

78430025 is a wasteful number, since it uses less digits than its factorization.

78430025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137211 (or 3137206 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 78430025 is about 8856.0727752204. The cubic root of 78430025 is about 428.0496219434.

The spelling of 78430025 in words is "seventy-eight million, four hundred thirty thousand, twenty-five".