74778086 has 4 divisors (see below), whose sum is σ = 112167132. Its totient is φ = 37389042.

The previous prime is 74778059. The next prime is 74778101. The reversal of 74778086 is 68087747.

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

It is a self number, because there is not a number n which added to its sum of digits gives 74778086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18694520 + ... + 18694523.

It is an arithmetic number, because the mean of its divisors is an integer number (28041783).

Almost surely, 2^74778086 is an apocalyptic number.

74778086 is a deficient number, since it is larger than the sum of its proper divisors (37389046).

74778086 is a wasteful number, since it uses less digits than its factorization.

74778086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37389045.

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 74778086 is about 8647.4323356705. The cubic root of 74778086 is about 421.2999894888.

The spelling of 74778086 in words is "seventy-four million, seven hundred seventy-eight thousand, eighty-six".