774949478 has 16 divisors (see below), whose sum is σ = 1170399120. Its totient is φ = 384825600.

The previous prime is 774949477. The next prime is 774949577. The reversal of 774949478 is 874949477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774949477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195173 + ... + 199103.

It is an arithmetic number, because the mean of its divisors is an integer number (73149945).

Almost surely, 2^774949478 is an apocalyptic number.

774949478 is a deficient number, since it is larger than the sum of its proper divisors (395449642).

774949478 is a wasteful number, since it uses less digits than its factorization.

774949478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4583.

The product of its digits is 14224896, while the sum is 59.

The square root of 774949478 is about 27837.9143974544. The cubic root of 774949478 is about 918.5253146833.

Subtracting 774949478 from its reverse (874949477), we obtain a palindrome (99999999).

The spelling of 774949478 in words is "seven hundred seventy-four million, nine hundred forty-nine thousand, four hundred seventy-eight".