1301800820 has 24 divisors (see below), whose sum is σ = 2735724264. Its totient is φ = 520350336.

The previous prime is 1301800781. The next prime is 1301800837. The reversal of 1301800820 is 280081031.

It can be written as a sum of positive squares in 4 ways, for example, as 333719824 + 968080996 = 18268^2 + 31114^2 .

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, 6662 + ... + 51458.

It is an arithmetic number, because the mean of its divisors is an integer number (113988511).

Almost surely, 2^1301800820 is an apocalyptic number.

1301800820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301800820 is an abundant number, since it is smaller than the sum of its proper divisors (1433923444).

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

1301800820 is a wasteful number, since it uses less digits than its factorization.

1301800820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46259 (or 46257 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1301800820 is about 36080.4769924124. The cubic root of 1301800820 is about 1091.8965998066.

Adding to 1301800820 its reverse (280081031), we get a palindrome (1581881851).

The spelling of 1301800820 in words is "one billion, three hundred one million, eight hundred thousand, eight hundred twenty".