78412806 has 64 divisors (see below), whose sum is σ = 185803200. Its totient is φ = 24427008.

The previous prime is 78412799. The next prime is 78412813. The reversal of 78412806 is 60821487.

It is an interprime number because it is at equal distance from previous prime (78412799) and next prime (78412813).

It is a super-2 number, since 2×78412806² = 12297136289587272, 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 31 ways as a sum of consecutive naturals, for example, 210036 + ... + 210408.

It is an arithmetic number, because the mean of its divisors is an integer number (2903175).

Almost surely, 2^78412806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78412806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92901600).

78412806 is an abundant number, since it is smaller than the sum of its proper divisors (107390394).

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

78412806 is a wasteful number, since it uses less digits than its factorization.

78412806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78412806 is about 8855.1005640817. The cubic root of 78412806 is about 428.0182941201.

The spelling of 78412806 in words is "seventy-eight million, four hundred twelve thousand, eight hundred six".