774398690 has 16 divisors (see below), whose sum is σ = 1501142328. Its totient is φ = 285931776.

The previous prime is 774398683. The next prime is 774398699. The reversal of 774398690 is 96893477.

It can be written as a sum of positive squares in 4 ways, for example, as 217297081 + 557101609 = 14741^2 + 23603^2 .

It is a super-2 number, since 2×774398690² = 1199386662147432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (774398699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2978327 + ... + 2978586.

Almost surely, 2^774398690 is an apocalyptic number.

774398690 is a deficient number, since it is larger than the sum of its proper divisors (726743638).

774398690 is a wasteful number, since it uses less digits than its factorization.

774398690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956933.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 774398690 is about 27828.0198720642. The cubic root of 774398690 is about 918.3076520527.

The spelling of 774398690 in words is "seven hundred seventy-four million, three hundred ninety-eight thousand, six hundred ninety".