1448279381 has 4 divisors (see below), whose sum is σ = 1448837100. Its totient is φ = 1447721664.

The previous prime is 1448279377. The next prime is 1448279383. The reversal of 1448279381 is 1839728441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1839728441 = 5783 ⋅318127.

It can be written as a sum of positive squares in 2 ways, for example, as 1030731025 + 417548356 = 32105^2 + 20434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1448279381 - 2² = 1448279377 is a prime.

It is a super-2 number, since 2×1448279381² = 4195026330859486322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1448279383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274946 + ... + 280163.

It is an arithmetic number, because the mean of its divisors is an integer number (362209275).

Almost surely, 2^1448279381 is an apocalyptic number.

It is an amenable number.

1448279381 is a deficient number, since it is larger than the sum of its proper divisors (557719).

1448279381 is an equidigital number, since it uses as much as digits as its factorization.

1448279381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557718.

The product of its digits is 387072, while the sum is 47.

The square root of 1448279381 is about 38056.2659886647. The cubic root of 1448279381 is about 1131.4033211358.

The spelling of 1448279381 in words is "one billion, four hundred forty-eight million, two hundred seventy-nine thousand, three hundred eighty-one".