774894240 has 72 divisors (see below), whose sum is σ = 2644331508. Its totient is φ = 206638080.

The previous prime is 774894209. The next prime is 774894247. The reversal of 774894240 is 42498477.

It can be written as a sum of positive squares in 2 ways, for example, as 767733264 + 7160976 = 27708^2 + 2676^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×774894240² = 1200922166370355200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (774894247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267621 + ... + 270500.

Almost surely, 2^774894240 is an apocalyptic number.

It is an amenable number.

774894240 is an abundant number, since it is smaller than the sum of its proper divisors (1869437268).

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

774894240 is a wasteful number, since it uses less digits than its factorization.

774894240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538142 (or 538131 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 774894240 is about 27836.9222436677. The cubic root of 774894240 is about 918.5034901608.

The spelling of 774894240 in words is "seven hundred seventy-four million, eight hundred ninety-four thousand, two hundred forty".