1427773220 has 48 divisors (see below), whose sum is σ = 3179999088. Its totient is φ = 536616960.

The previous prime is 1427773219. The next prime is 1427773261. The reversal of 1427773220 is 223777241.

1427773220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 64096036 + 1363677184 = 8006^2 + 36928^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221564 + ... + 227916.

It is an arithmetic number, because the mean of its divisors is an integer number (66249981).

Almost surely, 2^1427773220 is an apocalyptic number.

1427773220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1427773220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1589999544).

1427773220 is an abundant number, since it is smaller than the sum of its proper divisors (1752225868).

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

1427773220 is a wasteful number, since it uses less digits than its factorization.

1427773220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040 (or 7038 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 1427773220 is about 37785.8865186461. The cubic root of 1427773220 is about 1126.0380791975.

The spelling of 1427773220 in words is "one billion, four hundred twenty-seven million, seven hundred seventy-three thousand, two hundred twenty".