1438975493 has 8 divisors (see below), whose sum is σ = 1475472888. Its totient is φ = 1402824384.

The previous prime is 1438975481. The next prime is 1438975501. The reversal of 1438975493 is 3945798341.

It can be written as a sum of positive squares in 4 ways, for example, as 211033729 + 1227941764 = 14527^2 + 35042^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1438975493 - 2¹² = 1438971397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438975423) 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, 78146 + ... + 94787.

It is an arithmetic number, because the mean of its divisors is an integer number (184434111).

Almost surely, 2^1438975493 is an apocalyptic number.

It is an amenable number.

1438975493 is a deficient number, since it is larger than the sum of its proper divisors (36497395).

1438975493 is a wasteful number, since it uses less digits than its factorization.

1438975493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173143.

The product of its digits is 3265920, while the sum is 53.

The square root of 1438975493 is about 37933.8304551491. The cubic root of 1438975493 is about 1128.9753661213.

The spelling of 1438975493 in words is "one billion, four hundred thirty-eight million, nine hundred seventy-five thousand, four hundred ninety-three".