78611206 has 4 divisors (see below), whose sum is σ = 117916812. Its totient is φ = 39305602.

The previous prime is 78611201. The next prime is 78611219. The reversal of 78611206 is 60211687.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78611201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19652800 + ... + 19652803.

It is an arithmetic number, because the mean of its divisors is an integer number (29479203).

Almost surely, 2^78611206 is an apocalyptic number.

78611206 is a deficient number, since it is larger than the sum of its proper divisors (39305606).

78611206 is a wasteful number, since it uses less digits than its factorization.

78611206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39305605.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 78611206 is about 8866.2960699494. The cubic root of 78611206 is about 428.3789805686.

The spelling of 78611206 in words is "seventy-eight million, six hundred eleven thousand, two hundred six".