1290680180 has 12 divisors (see below), whose sum is σ = 2710428420. Its totient is φ = 516272064.

The previous prime is 1290680179. The next prime is 1290680189. The reversal of 1290680180 is 810860921.

It can be written as a sum of positive squares in 2 ways, for example, as 462852196 + 827827984 = 21514^2 + 28772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1290680180.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290680189) 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, 32266985 + ... + 32267024.

It is an arithmetic number, because the mean of its divisors is an integer number (225869035).

Almost surely, 2^1290680180 is an apocalyptic number.

1290680180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290680180 is an abundant number, since it is smaller than the sum of its proper divisors (1419748240).

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

1290680180 is a wasteful number, since it uses less digits than its factorization.

1290680180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64534018 (or 64534016 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1290680180 is about 35926.0376328924. The cubic root of 1290680180 is about 1088.7785267774.

The spelling of 1290680180 in words is "one billion, two hundred ninety million, six hundred eighty thousand, one hundred eighty".