774220647 has 8 divisors (see below), whose sum is σ = 1093017456. Its totient is φ = 485785472.

The previous prime is 774220637. The next prime is 774220673. The reversal of 774220647 is 746022477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 774220647 - 2⁶ = 774220583 is a prime.

It is a super-2 number, since 2×774220647² = 1198835220482197218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774220637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7590348 + ... + 7590449.

It is an arithmetic number, because the mean of its divisors is an integer number (136627182).

Almost surely, 2^774220647 is an apocalyptic number.

774220647 is a deficient number, since it is larger than the sum of its proper divisors (318796809).

774220647 is a wasteful number, since it uses less digits than its factorization.

774220647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15180817.

The product of its (nonzero) digits is 131712, while the sum is 39.

The square root of 774220647 is about 27824.8207002309. The cubic root of 774220647 is about 918.2372702270.

The spelling of 774220647 in words is "seven hundred seventy-four million, two hundred twenty thousand, six hundred forty-seven".