261869344 has 24 divisors (see below), whose sum is σ = 562424688. Its totient is φ = 119031360.

The previous prime is 261869341. The next prime is 261869347. The reversal of 261869344 is 443968162.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (261869341) and next prime (261869347).

It is a self number, because there is not a number n which added to its sum of digits gives 261869344.

It is not an unprimeable number, because it can be changed into a prime (261869341) 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, 371622 + ... + 372325.

It is an arithmetic number, because the mean of its divisors is an integer number (23434362).

Almost surely, 2^261869344 is an apocalyptic number.

It is an amenable number.

261869344 is an abundant number, since it is smaller than the sum of its proper divisors (300555344).

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

261869344 is a wasteful number, since it uses less digits than its factorization.

261869344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743968 (or 743960 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 261869344 is about 16182.3775756222. The cubic root of 261869344 is about 639.7764062682.

The spelling of 261869344 in words is "two hundred sixty-one million, eight hundred sixty-nine thousand, three hundred forty-four".