1343878538 has 4 divisors (see below), whose sum is σ = 2015817810. Its totient is φ = 671939268.

The previous prime is 1343878537. The next prime is 1343878561. The reversal of 1343878538 is 8358783431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 787531969 + 556346569 = 28063^2 + 23587^2 .

It is not an unprimeable number, because it can be changed into a prime (1343878537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335969633 + ... + 335969636.

Almost surely, 2^1343878538 is an apocalyptic number.

1343878538 is a deficient number, since it is larger than the sum of its proper divisors (671939272).

1343878538 is an equidigital number, since it uses as much as digits as its factorization.

1343878538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671939271.

The product of its digits is 1935360, while the sum is 50.

The square root of 1343878538 is about 36658.9489483809. The cubic root of 1343878538 is about 1103.5364250620.

The spelling of 1343878538 in words is "one billion, three hundred forty-three million, eight hundred seventy-eight thousand, five hundred thirty-eight".