261350244 has 72 divisors (see below), whose sum is σ = 699578880. Its totient is φ = 82036800.

The previous prime is 261350213. The next prime is 261350269. The reversal of 261350244 is 442053162.

261350244 is a `hidden beast` number, since 2 + 613 + 5 + 0 + 2 + 44 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122749 + ... + 124859.

Almost surely, 2^261350244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261350244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349789440).

261350244 is an abundant number, since it is smaller than the sum of its proper divisors (438228636).

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

261350244 is a wasteful number, since it uses less digits than its factorization.

261350244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2316 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 261350244 is about 16166.3305669530. The cubic root of 261350244 is about 639.3533866385.

The spelling of 261350244 in words is "two hundred sixty-one million, three hundred fifty thousand, two hundred forty-four".