78102285 has 8 divisors (see below), whose sum is σ = 124963680. Its totient is φ = 41654544.

The previous prime is 78102281. The next prime is 78102289. The reversal of 78102285 is 58220187.

It is an interprime number because it is at equal distance from previous prime (78102281) and next prime (78102289).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78102285 - 2² = 78102281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78102281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2603395 + ... + 2603424.

It is an arithmetic number, because the mean of its divisors is an integer number (15620460).

Almost surely, 2^78102285 is an apocalyptic number.

It is an amenable number.

78102285 is a deficient number, since it is larger than the sum of its proper divisors (46861395).

78102285 is a wasteful number, since it uses less digits than its factorization.

78102285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206827.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 78102285 is about 8837.5497169747. The cubic root of 78102285 is about 427.4525510759.

It can be divided in two parts, 78102 and 285, that added together give a palindrome (78387).

The spelling of 78102285 in words is "seventy-eight million, one hundred two thousand, two hundred eighty-five".