774138 has 8 divisors (see below), whose sum is σ = 1548288. Its totient is φ = 258044.

The previous prime is 774133. The next prime is 774143. The reversal of 774138 is 831477.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (774133) and next prime (774143).

It is a sphenic number, since it is the product of 3 distinct primes.

774138 is an admirable number.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (774131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64506 + ... + 64517.

It is an arithmetic number, because the mean of its divisors is an integer number (193536).

774138 is a Friedman number, since it can be written as 48^3*7-7+1, using all its digits and the basic arithmetic operations.

2⁷⁷⁴¹³⁸ is an apocalyptic number.

774138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

774138 is a wasteful number, since it uses less digits than its factorization.

774138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129028.

The product of its digits is 4704, while the sum is 30.

The square root of 774138 is about 879.8511237704. The cubic root of 774138 is about 91.8204595538.

It can be divided in two parts, 77413 and 8, that added together give a triangular number (77421 = T₃₉₃).

The spelling of 774138 in words is "seven hundred seventy-four thousand, one hundred thirty-eight".