261794440 has 16 divisors (see below), whose sum is σ = 589037580. Its totient is φ = 104717760.

The previous prime is 261794431. The next prime is 261794443. The reversal of 261794440 is 44497162.

It is a happy number.

261794440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 260951716 + 842724 = 16154^2 + 918^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261794440.

It is not an unprimeable number, because it can be changed into a prime (261794443) 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, 3272391 + ... + 3272470.

Almost surely, 2^261794440 is an apocalyptic number.

261794440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261794440 is an abundant number, since it is smaller than the sum of its proper divisors (327243140).

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

261794440 is a wasteful number, since it uses less digits than its factorization.

261794440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6544872 (or 6544868 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 261794440 is about 16180.0630406683. The cubic root of 261794440 is about 639.7154008052.

The spelling of 261794440 in words is "two hundred sixty-one million, seven hundred ninety-four thousand, four hundred forty".