774228386 has 4 divisors (see below), whose sum is σ = 1161342582. Its totient is φ = 387114192.

The previous prime is 774228383. The next prime is 774228391. The reversal of 774228386 is 683822477.

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., 546671161 + 227557225 = 23381^2 + 15085^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 774228386.

It is not an unprimeable number, because it can be changed into a prime (774228383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193557095 + ... + 193557098.

Almost surely, 2^774228386 is an apocalyptic number.

774228386 is a deficient number, since it is larger than the sum of its proper divisors (387114196).

774228386 is a wasteful number, since it uses less digits than its factorization.

774228386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387114195.

The product of its digits is 903168, while the sum is 47.

The square root of 774228386 is about 27824.9597663680. The cubic root of 774228386 is about 918.2403297400.

The spelling of 774228386 in words is "seven hundred seventy-four million, two hundred twenty-eight thousand, three hundred eighty-six".