261423432 has 48 divisors (see below), whose sum is σ = 745290000. Its totient is φ = 82554336.

The previous prime is 261423427. The next prime is 261423443. The reversal of 261423432 is 234324162.

261423432 is a `hidden beast` number, since 2 + 614 + 2 + 3 + 43 + 2 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 261423396 and 261423405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94182 + ... + 96917.

It is an arithmetic number, because the mean of its divisors is an integer number (15526875).

Almost surely, 2^261423432 is an apocalyptic number.

It is an amenable number.

261423432 is an abundant number, since it is smaller than the sum of its proper divisors (483866568).

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

261423432 is a wasteful number, since it uses less digits than its factorization.

261423432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191130 (or 191123 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 261423432 is about 16168.5940019533. The cubic root of 261423432 is about 639.4130621499.

Adding to 261423432 its reverse (234324162), we get a palindrome (495747594).

The spelling of 261423432 in words is "two hundred sixty-one million, four hundred twenty-three thousand, four hundred thirty-two".