1428638324 has 24 divisors (see below), whose sum is σ = 2562887880. Its totient is φ = 696605184.

The previous prime is 1428638297. The next prime is 1428638327. The reversal of 1428638324 is 4238368241.

It can be written as a sum of positive squares in 4 ways, for example, as 69388900 + 1359249424 = 8330^2 + 36868^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428638327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499 + ... + 53474.

It is an arithmetic number, because the mean of its divisors is an integer number (106786995).

Almost surely, 2^1428638324 is an apocalyptic number.

It is an amenable number.

1428638324 is a deficient number, since it is larger than the sum of its proper divisors (1134249556).

1428638324 is a wasteful number, since it uses less digits than its factorization.

1428638324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55139 (or 55137 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 1428638324 is about 37797.3322339024. The cubic root of 1428638324 is about 1126.2654596973.

The spelling of 1428638324 in words is "one billion, four hundred twenty-eight million, six hundred thirty-eight thousand, three hundred twenty-four".