78286425 has 48 divisors (see below), whose sum is σ = 151573632. Its totient is φ = 34905600.

The previous prime is 78286391. The next prime is 78286433. The reversal of 78286425 is 52468287.

It is a happy number.

It is not a de Polignac number, because 78286425 - 2¹⁰ = 78285401 is a prime.

It is a super-2 number, since 2×78286425² = 12257528678561250, which contains 22 as substring.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 19707 + ... + 23343.

It is an arithmetic number, because the mean of its divisors is an integer number (3157784).

Almost surely, 2^78286425 is an apocalyptic number.

78286425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78286425 is a deficient number, since it is larger than the sum of its proper divisors (73287207).

78286425 is a wasteful number, since it uses less digits than its factorization.

78286425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698 (or 3693 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 78286425 is about 8847.9616296636. The cubic root of 78286425 is about 427.7882191688.

The spelling of 78286425 in words is "seventy-eight million, two hundred eighty-six thousand, four hundred twenty-five".