1284628390 has 16 divisors (see below), whose sum is σ = 2313184032. Its totient is φ = 513661824.

The previous prime is 1284628369. The next prime is 1284628391. The reversal of 1284628390 is 938264821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284628391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6622 + ... + 51118.

It is an arithmetic number, because the mean of its divisors is an integer number (144574002).

Almost surely, 2^1284628390 is an apocalyptic number.

1284628390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1284628390 is a deficient number, since it is larger than the sum of its proper divisors (1028555642).

1284628390 is a wasteful number, since it uses less digits than its factorization.

1284628390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47391.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1284628390 is about 35841.7129891974. The cubic root of 1284628390 is about 1087.0741581930.

The spelling of 1284628390 in words is "one billion, two hundred eighty-four million, six hundred twenty-eight thousand, three hundred ninety".