1284422020 has 48 divisors (see below), whose sum is σ = 3096511488. Its totient is φ = 438387840.

The previous prime is 1284422011. The next prime is 1284422077. The reversal of 1284422020 is 202244821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10650 + ... + 51790.

It is an arithmetic number, because the mean of its divisors is an integer number (64510656).

Almost surely, 2^1284422020 is an apocalyptic number.

1284422020 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 1284422020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548255744).

1284422020 is an abundant number, since it is smaller than the sum of its proper divisors (1812089468).

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

1284422020 is a wasteful number, since it uses less digits than its factorization.

1284422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41380 (or 41378 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 1284422020 is about 35838.8339654069. The cubic root of 1284422020 is about 1087.0159438202.

Adding to 1284422020 its reverse (202244821), we get a palindrome (1486666841).

The spelling of 1284422020 in words is "one billion, two hundred eighty-four million, four hundred twenty-two thousand, twenty".