1438284845 has 4 divisors (see below), whose sum is σ = 1725941820. Its totient is φ = 1150627872.

The previous prime is 1438284821. The next prime is 1438284851. The reversal of 1438284845 is 5484828341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5484828341 = 41 ⋅133776301.

It can be written as a sum of positive squares in 2 ways, for example, as 371217289 + 1067067556 = 19267^2 + 32666^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438284845 - 2¹² = 1438280749 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1438284845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143828480 + ... + 143828489.

It is an arithmetic number, because the mean of its divisors is an integer number (431485455).

Almost surely, 2^1438284845 is an apocalyptic number.

It is an amenable number.

1438284845 is a deficient number, since it is larger than the sum of its proper divisors (287656975).

1438284845 is an equidigital number, since it uses as much as digits as its factorization.

1438284845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287656974.

The product of its digits is 983040, while the sum is 47.

The square root of 1438284845 is about 37924.7260372438. The cubic root of 1438284845 is about 1128.7947169116.

The spelling of 1438284845 in words is "one billion, four hundred thirty-eight million, two hundred eighty-four thousand, eight hundred forty-five".