78360287 has 4 divisors (see below), whose sum is σ = 81767280. Its totient is φ = 74953296.

The previous prime is 78360263. The next prime is 78360323. The reversal of 78360287 is 78206387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78206387 = 7 ⋅11172341.

It is a cyclic number.

It is not a de Polignac number, because 78360287 - 2⁶ = 78360223 is a prime.

It is a super-2 number, since 2×78360287² = 12280669157444738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78360187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703462 + ... + 1703507.

It is an arithmetic number, because the mean of its divisors is an integer number (20441820).

Almost surely, 2^78360287 is an apocalyptic number.

78360287 is a deficient number, since it is larger than the sum of its proper divisors (3406993).

78360287 is a wasteful number, since it uses less digits than its factorization.

78360287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406992.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 78360287 is about 8852.1346013264. The cubic root of 78360287 is about 427.9227140125.

The spelling of 78360287 in words is "seventy-eight million, three hundred sixty thousand, two hundred eighty-seven".