1428621344 has 12 divisors (see below), whose sum is σ = 2812598334. Its totient is φ = 714310656.

The previous prime is 1428621331. The next prime is 1428621347. The reversal of 1428621344 is 4431268241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 979690000 + 448931344 = 31300^2 + 21188^2 .

It is not an unprimeable number, because it can be changed into a prime (1428621347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22322177 + ... + 22322240.

Almost surely, 2^1428621344 is an apocalyptic number.

It is an amenable number.

1428621344 is a deficient number, since it is larger than the sum of its proper divisors (1383976990).

1428621344 is an equidigital number, since it uses as much as digits as its factorization.

1428621344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44644427 (or 44644419 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 1428621344 is about 37797.1076142077. The cubic root of 1428621344 is about 1126.2609976248.

Adding to 1428621344 its reverse (4431268241), we get a palindrome (5859889585).

The spelling of 1428621344 in words is "one billion, four hundred twenty-eight million, six hundred twenty-one thousand, three hundred forty-four".