74778790 has 16 divisors (see below), whose sum is σ = 135118368. Its totient is φ = 29796736.

The previous prime is 74778751. The next prime is 74778799. The reversal of 74778790 is 9787747.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74778799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11587 + ... + 16846.

It is an arithmetic number, because the mean of its divisors is an integer number (8444898).

Almost surely, 2^74778790 is an apocalyptic number.

74778790 is a deficient number, since it is larger than the sum of its proper divisors (60339578).

74778790 is a wasteful number, since it uses less digits than its factorization.

74778790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28703.

The product of its (nonzero) digits is 691488, while the sum is 49.

The square root of 74778790 is about 8647.4730412994. The cubic root of 74778790 is about 421.3013115975.

The spelling of 74778790 in words is "seventy-four million, seven hundred seventy-eight thousand, seven hundred ninety".