774431636 has 12 divisors (see below), whose sum is σ = 1478460480. Its totient is φ = 352014360.

The previous prime is 774431629. The next prime is 774431639. The reversal of 774431636 is 636134477.

It is a junction number, because it is equal to n+sod(n) for n = 774431593 and 774431602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774431639) 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, 8800316 + ... + 8800403.

It is an arithmetic number, because the mean of its divisors is an integer number (123205040).

Almost surely, 2^774431636 is an apocalyptic number.

It is an amenable number.

774431636 is a deficient number, since it is larger than the sum of its proper divisors (704028844).

774431636 is a wasteful number, since it uses less digits than its factorization.

774431636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17600734 (or 17600732 counting only the distinct ones).

The product of its digits is 254016, while the sum is 41.

The square root of 774431636 is about 27828.6118230860. The cubic root of 774431636 is about 918.3206746879.

The spelling of 774431636 in words is "seven hundred seventy-four million, four hundred thirty-one thousand, six hundred thirty-six".