1306439288 has 32 divisors (see below), whose sum is σ = 3054015360. Its totient is φ = 509002080.

The previous prime is 1306439269. The next prime is 1306439311. The reversal of 1306439288 is 8829346031.

It is a super-2 number, since 2×1306439288² = 3413567226459893888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059806 + ... + 1061037.

It is an arithmetic number, because the mean of its divisors is an integer number (95437980).

Almost surely, 2^1306439288 is an apocalyptic number.

It is an amenable number.

1306439288 is an abundant number, since it is smaller than the sum of its proper divisors (1747576072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1306439288 is a wasteful number, since it uses less digits than its factorization.

1306439288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120867 (or 2120863 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1306439288 is about 36144.6993070907. The cubic root of 1306439288 is about 1093.1919141728.

It can be divided in two parts, 130643 and 9288, that added together give a palindrome (139931).

The spelling of 1306439288 in words is "one billion, three hundred six million, four hundred thirty-nine thousand, two hundred eighty-eight".