78508375 has 16 divisors (see below), whose sum is σ = 106887456. Its totient is φ = 57096000.

The previous prime is 78508343. The next prime is 78508387. The reversal of 78508375 is 57380587.

It is not a de Polignac number, because 78508375 - 2⁵ = 78508343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27174 + ... + 29923.

It is an arithmetic number, because the mean of its divisors is an integer number (6680466).

Almost surely, 2^78508375 is an apocalyptic number.

78508375 is a deficient number, since it is larger than the sum of its proper divisors (28379081).

78508375 is a wasteful number, since it uses less digits than its factorization.

78508375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57123 (or 57113 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 78508375 is about 8860.4951893221. The cubic root of 78508375 is about 428.1921121281.

The spelling of 78508375 in words is "seventy-eight million, five hundred eight thousand, three hundred seventy-five".