1438760761 has 9 divisors (see below), whose sum is σ = 1459497711. Its totient is φ = 1418315952.

The previous prime is 1438760683. The next prime is 1438760773. The reversal of 1438760761 is 1670678341.

The square root of 1438760761 is 37931.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1244325625 + 194435136 = 35275^2 + 13944^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1438760761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1438760261) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3148045 + ... + 3148501.

Almost surely, 2^1438760761 is an apocalyptic number.

1438760761 is the 37931-st square number.

1438760761 is the 18966-th centered octagonal number.

It is an amenable number.

1438760761 is a deficient number, since it is larger than the sum of its proper divisors (20736950).

1438760761 is an frugal number, since it uses more digits than its factorization.

1438760761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The cubic root of 1438760761 is about 1128.9192059807.

The spelling of 1438760761 in words is "one billion, four hundred thirty-eight million, seven hundred sixty thousand, seven hundred sixty-one".