78285259 has 4 divisors (see below), whose sum is σ = 84307216. Its totient is φ = 72263304.

The previous prime is 78285257. The next prime is 78285269. The reversal of 78285259 is 95258287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95258287 = 43 ⋅2215309.

It is a cyclic number.

It is not a de Polignac number, because 78285259 - 2¹ = 78285257 is a prime.

It is a super-2 number, since 2×78285259² = 12257163553394162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78285257) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3010959 + ... + 3010984.

It is an arithmetic number, because the mean of its divisors is an integer number (21076804).

Almost surely, 2^78285259 is an apocalyptic number.

78285259 is a deficient number, since it is larger than the sum of its proper divisors (6021957).

78285259 is a wasteful number, since it uses less digits than its factorization.

78285259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021956.

The product of its digits is 403200, while the sum is 46.

The square root of 78285259 is about 8847.8957385358. The cubic root of 78285259 is about 427.7860953287.

The spelling of 78285259 in words is "seventy-eight million, two hundred eighty-five thousand, two hundred fifty-nine".