78810425 has 12 divisors (see below), whose sum is σ = 99185616. Its totient is φ = 62106000.

The previous prime is 78810367. The next prime is 78810437. The reversal of 78810425 is 52401887.

It is not a de Polignac number, because 78810425 - 2¹⁴ = 78794041 is a prime.

It is a super-2 number, since 2×78810425² = 12422166177361250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21851 + ... + 25200.

It is an arithmetic number, because the mean of its divisors is an integer number (8265468).

Almost surely, 2^78810425 is an apocalyptic number.

It is an amenable number.

78810425 is a deficient number, since it is larger than the sum of its proper divisors (20375191).

78810425 is a wasteful number, since it uses less digits than its factorization.

78810425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47128 (or 47123 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 78810425 is about 8877.5235848743. The cubic root of 78810425 is about 428.7405458225.

The spelling of 78810425 in words is "seventy-eight million, eight hundred ten thousand, four hundred twenty-five".