1300143440 has 40 divisors (see below), whose sum is σ = 3040338888. Its totient is φ = 517045760.

The previous prime is 1300143437. The next prime is 1300143451. The reversal of 1300143440 is 443410031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 224041024 + 1076102416 = 14968^2 + 32804^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33131 + ... + 60810.

Almost surely, 2^1300143440 is an apocalyptic number.

1300143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300143440 is an abundant number, since it is smaller than the sum of its proper divisors (1740195448).

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

1300143440 is a wasteful number, since it uses less digits than its factorization.

1300143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94127 (or 94121 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1300143440 is about 36057.5018546765. The cubic root of 1300143440 is about 1091.4330224554.

Adding to 1300143440 its reverse (443410031), we get a palindrome (1743553471).

The spelling of 1300143440 in words is "one billion, three hundred million, one hundred forty-three thousand, four hundred forty".