774820138 has 16 divisors (see below), whose sum is σ = 1201165056. Its totient is φ = 374461920.

The previous prime is 774820129. The next prime is 774820141. The reversal of 774820138 is 831028477.

774820138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 774820138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47670 + ... + 61822.

It is an arithmetic number, because the mean of its divisors is an integer number (75072816).

Almost surely, 2^774820138 is an apocalyptic number.

774820138 is a deficient number, since it is larger than the sum of its proper divisors (426344918).

774820138 is a wasteful number, since it uses less digits than its factorization.

774820138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15069.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 774820138 is about 27835.5912098163. The cubic root of 774820138 is about 918.4742108468.

The spelling of 774820138 in words is "seven hundred seventy-four million, eight hundred twenty thousand, one hundred thirty-eight".