260481780 has 72 divisors (see below), whose sum is σ = 850914792. Its totient is φ = 64118016.

The previous prime is 260481779. The next prime is 260481787. The reversal of 260481780 is 87184062.

It can be written as a sum of positive squares in 4 ways, for example, as 23444964 + 237036816 = 4842^2 + 15396^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260481787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53319 + ... + 57998.

It is an arithmetic number, because the mean of its divisors is an integer number (11818261).

Almost surely, 2^260481780 is an apocalyptic number.

260481780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260481780 is an abundant number, since it is smaller than the sum of its proper divisors (590433012).

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

260481780 is a wasteful number, since it uses less digits than its factorization.

260481780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111345 (or 111340 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 260481780 is about 16139.4479459491. The cubic root of 260481780 is about 638.6444126516.

The spelling of 260481780 in words is "two hundred sixty million, four hundred eighty-one thousand, seven hundred eighty".