78788275 has 12 divisors (see below), whose sum is σ = 97929000. Its totient is φ = 62881280.

The previous prime is 78788257. The next prime is 78788287. The reversal of 78788275 is 57288787.

It is a happy number.

It is not a de Polignac number, because 78788275 - 2¹⁵ = 78755507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7716 + ... + 14734.

It is an arithmetic number, because the mean of its divisors is an integer number (8160750).

Almost surely, 2^78788275 is an apocalyptic number.

78788275 is a deficient number, since it is larger than the sum of its proper divisors (19140725).

78788275 is a wasteful number, since it uses less digits than its factorization.

78788275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478 (or 7473 counting only the distinct ones).

The product of its digits is 1756160, while the sum is 52.

The square root of 78788275 is about 8876.2759646149. The cubic root of 78788275 is about 428.7003756170.

The spelling of 78788275 in words is "seventy-eight million, seven hundred eighty-eight thousand, two hundred seventy-five".