261033344 has 96 divisors (see below), whose sum is σ = 614858040. Its totient is φ = 109424640.

The previous prime is 261033341. The next prime is 261033391. The reversal of 261033344 is 443330162.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261033341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237404 + ... + 238500.

Almost surely, 2^261033344 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 261033344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307429020).

261033344 is an abundant number, since it is smaller than the sum of its proper divisors (353824696).

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

261033344 is a wasteful number, since it uses less digits than its factorization.

261033344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 261033344 is about 16156.5263593385. The cubic root of 261033344 is about 639.0948663322.

The spelling of 261033344 in words is "two hundred sixty-one million, thirty-three thousand, three hundred forty-four".