774643441 has 24 divisors (see below), whose sum is σ = 928117440. Its totient is φ = 640785600.

The previous prime is 774643423. The next prime is 774643483. The reversal of 774643441 is 144346477.

It is a happy number.

It is not a de Polignac number, because 774643441 - 2¹⁵ = 774610673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 774643394 and 774643403.

It is not an unprimeable number, because it can be changed into a prime (774646441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129055 + ... + 134923.

It is an arithmetic number, because the mean of its divisors is an integer number (38671560).

Almost surely, 2^774643441 is an apocalyptic number.

774643441 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

774643441 is a deficient number, since it is larger than the sum of its proper divisors (153473999).

774643441 is a wasteful number, since it uses less digits than its factorization.

774643441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977 (or 5964 counting only the distinct ones).

The product of its digits is 225792, while the sum is 40.

The square root of 774643441 is about 27832.4170887115. The cubic root of 774643441 is about 918.4043864803.

The spelling of 774643441 in words is "seven hundred seventy-four million, six hundred forty-three thousand, four hundred forty-one".