774386642 has 4 divisors (see below), whose sum is σ = 1161579966. Its totient is φ = 387193320.

The previous prime is 774386621. The next prime is 774386647. The reversal of 774386642 is 246683477.

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

It can be written as a sum of positive squares in only one way, i.e., 609546721 + 164839921 = 24689^2 + 12839^2 .

It is not an unprimeable number, because it can be changed into a prime (774386647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193596659 + ... + 193596662.

Almost surely, 2^774386642 is an apocalyptic number.

774386642 is a deficient number, since it is larger than the sum of its proper divisors (387193324).

774386642 is a wasteful number, since it uses less digits than its factorization.

774386642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387193323.

The product of its digits is 1354752, while the sum is 47.

The square root of 774386642 is about 27827.8033987593. The cubic root of 774386642 is about 918.3028897220.

The spelling of 774386642 in words is "seven hundred seventy-four million, three hundred eighty-six thousand, six hundred forty-two".