78111804 has 48 divisors (see below), whose sum is σ = 193632768. Its totient is φ = 24423168.

The previous prime is 78111799. The next prime is 78111823. The reversal of 78111804 is 40811187.

It is a super-2 number, since 2×78111804² = 12202907848268832, which contains 22 as substring.

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, 94039 + ... + 94865.

It is an arithmetic number, because the mean of its divisors is an integer number (4034016).

Almost surely, 2^78111804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78111804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96816384).

78111804 is an abundant number, since it is smaller than the sum of its proper divisors (115520964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78111804 is a wasteful number, since it uses less digits than its factorization.

78111804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 78111804 is about 8838.0882548207. The cubic root of 78111804 is about 427.4699161485.

The spelling of 78111804 in words is "seventy-eight million, one hundred eleven thousand, eight hundred four".