78455 has 16 divisors (see below), whose sum is σ = 108864. Its totient is φ = 53760.

The previous prime is 78439. The next prime is 78467. The reversal of 78455 is 55487.

It is not a de Polignac number, because 78455 - 2⁴ = 78439 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, 1070 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (6804).

2⁷⁸⁴⁵⁵ is an apocalyptic number.

78455 is a deficient number, since it is larger than the sum of its proper divisors (30409).

78455 is a wasteful number, since it uses less digits than its factorization.

78455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106.

The product of its digits is 5600, while the sum is 29.

The square root of 78455 is about 280.0981970667. The cubic root of 78455 is about 42.8095052694.

The spelling of 78455 in words is "seventy-eight thousand, four hundred fifty-five".