261423044 has 12 divisors (see below), whose sum is σ = 457629564. Its totient is φ = 130671744.

The previous prime is 261422983. The next prime is 261423049. The reversal of 261423044 is 440324162.

It can be written as a sum of positive squares in 2 ways, for example, as 105472900 + 155950144 = 10270^2 + 12488^2 .

It is not an unprimeable number, because it can be changed into a prime (261423049) 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, 8744 + ... + 24480.

It is an arithmetic number, because the mean of its divisors is an integer number (38135797).

Almost surely, 2^261423044 is an apocalyptic number.

It is an amenable number.

261423044 is a deficient number, since it is larger than the sum of its proper divisors (196206520).

261423044 is a wasteful number, since it uses less digits than its factorization.

261423044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19894 (or 19892 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 261423044 is about 16168.5820033793. The cubic root of 261423044 is about 639.4127458146.

The spelling of 261423044 in words is "two hundred sixty-one million, four hundred twenty-three thousand, forty-four".