78113806 has 4 divisors (see below), whose sum is σ = 117170712. Its totient is φ = 39056902.

The previous prime is 78113801. The next prime is 78113813. The reversal of 78113806 is 60831187.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60831187 = 149 ⋅408263.

It is a super-2 number, since 2×78113806² = 12203533375611272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78113801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19528450 + ... + 19528453.

It is an arithmetic number, because the mean of its divisors is an integer number (29292678).

Almost surely, 2^78113806 is an apocalyptic number.

78113806 is a deficient number, since it is larger than the sum of its proper divisors (39056906).

78113806 is a wasteful number, since it uses less digits than its factorization.

78113806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39056905.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78113806 is about 8838.2015138828. The cubic root of 78113806 is about 427.4735681251.

The spelling of 78113806 in words is "seventy-eight million, one hundred thirteen thousand, eight hundred six".