774432220 has 12 divisors (see below), whose sum is σ = 1626307704. Its totient is φ = 309772880.

The previous prime is 774432209. The next prime is 774432221. The reversal of 774432220 is 22234477.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774432221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19360786 + ... + 19360825.

It is an arithmetic number, because the mean of its divisors is an integer number (135525642).

Almost surely, 2^774432220 is an apocalyptic number.

It is an amenable number.

774432220 is an abundant number, since it is smaller than the sum of its proper divisors (851875484).

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

774432220 is a wasteful number, since it uses less digits than its factorization.

774432220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38721620 (or 38721618 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 774432220 is about 27828.6223158819. The cubic root of 774432220 is about 918.3209055235.

Adding to 774432220 its reverse (22234477), we get a palindrome (796666697).

The spelling of 774432220 in words is "seven hundred seventy-four million, four hundred thirty-two thousand, two hundred twenty".