78910845 has 16 divisors (see below), whose sum is σ = 135969792. Its totient is φ = 38848320.

The previous prime is 78910831. The next prime is 78910849. The reversal of 78910845 is 54801987.

It is not a de Polignac number, because 78910845 - 2⁴ = 78910829 is a prime.

It is a super-2 number, since 2×78910845² = 12453842917228050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78910797 and 78910806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78910849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202141 + ... + 202530.

It is an arithmetic number, because the mean of its divisors is an integer number (8498112).

Almost surely, 2^78910845 is an apocalyptic number.

It is an amenable number.

78910845 is a deficient number, since it is larger than the sum of its proper divisors (57058947).

78910845 is a wasteful number, since it uses less digits than its factorization.

78910845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404692.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 78910845 is about 8883.1776409121. The cubic root of 78910845 is about 428.9225684930.

The spelling of 78910845 in words is "seventy-eight million, nine hundred ten thousand, eight hundred forty-five".