78065854 has 16 divisors (see below), whose sum is σ = 122950800. Its totient is φ = 37122624.

The previous prime is 78065821. The next prime is 78065857. The reversal of 78065854 is 45856087.

It is a self number, because there is not a number n which added to its sum of digits gives 78065854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78065857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6159 + ... + 13930.

It is an arithmetic number, because the mean of its divisors is an integer number (7684425).

Almost surely, 2^78065854 is an apocalyptic number.

78065854 is a deficient number, since it is larger than the sum of its proper divisors (44884946).

78065854 is a wasteful number, since it uses less digits than its factorization.

78065854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20187.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 78065854 is about 8835.4883283269. The cubic root of 78065854 is about 427.3860786468.

The spelling of 78065854 in words is "seventy-eight million, sixty-five thousand, eight hundred fifty-four".