78875505 has 32 divisors (see below), whose sum is σ = 145065600. Its totient is φ = 40614336.

The previous prime is 78875483. The next prime is 78875519. The reversal of 78875505 is 50557887.

It is a happy number.

78875505 is a `hidden beast` number, since 78 + 8 + 75 + 505 = 666.

It is not a de Polignac number, because 78875505 - 2¹⁵ = 78842737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6159 + ... + 13988.

It is an arithmetic number, because the mean of its divisors is an integer number (4533300).

Almost surely, 2^78875505 is an apocalyptic number.

It is an amenable number.

78875505 is a deficient number, since it is larger than the sum of its proper divisors (66190095).

78875505 is a wasteful number, since it uses less digits than its factorization.

78875505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20190 (or 20184 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 45.

The square root of 78875505 is about 8881.1882650916. The cubic root of 78875505 is about 428.8585283434.

The spelling of 78875505 in words is "seventy-eight million, eight hundred seventy-five thousand, five hundred five".