261748800 has 336 divisors, whose sum is σ = 978895680. Its totient is φ = 68014080.

The previous prime is 261748759. The next prime is 261748801. The reversal of 261748800 is 8847162.

261748800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (261748801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3153559 + ... + 3153641.

It is an arithmetic number, because the mean of its divisors is an integer number (2913380).

Almost surely, 2^261748800 is an apocalyptic number.

261748800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261748800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489447840).

261748800 is an abundant number, since it is smaller than the sum of its proper divisors (717146880).

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

261748800 is a wasteful number, since it uses less digits than its factorization.

261748800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 166 counting only the distinct ones).

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

The square root of 261748800 is about 16178.6526014993. The cubic root of 261748800 is about 639.6782236625.

The spelling of 261748800 in words is "two hundred sixty-one million, seven hundred forty-eight thousand, eight hundred".