1220742774 has 24 divisors (see below), whose sum is σ = 2709455112. Its totient is φ = 396989280.

The previous prime is 1220742773. The next prime is 1220742793. The reversal of 1220742774 is 4772470221.

It is a happy number.

1220742774 is a `hidden beast` number, since 1 + 220 + 7 + 427 + 7 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220742773) 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, 826324 + ... + 827799.

It is an arithmetic number, because the mean of its divisors is an integer number (112893963).

Almost surely, 2^1220742774 is an apocalyptic number.

1220742774 is an abundant number, since it is smaller than the sum of its proper divisors (1488712338).

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

1220742774 is a wasteful number, since it uses less digits than its factorization.

1220742774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654172 (or 1654169 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 36.

The square root of 1220742774 is about 34939.1295541260. The cubic root of 1220742774 is about 1068.7465375491.

The spelling of 1220742774 in words is "one billion, two hundred twenty million, seven hundred forty-two thousand, seven hundred seventy-four".