261006432 has 24 divisors (see below), whose sum is σ = 685142136. Its totient is φ = 87002112.

The previous prime is 261006407. The next prime is 261006443. The reversal of 261006432 is 234600162.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1359313 + ... + 1359504.

It is an arithmetic number, because the mean of its divisors is an integer number (28547589).

Almost surely, 2^261006432 is an apocalyptic number.

It is an amenable number.

261006432 is an abundant number, since it is smaller than the sum of its proper divisors (424135704).

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

261006432 is a wasteful number, since it uses less digits than its factorization.

261006432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718830 (or 2718822 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 261006432 is about 16155.6934855796. The cubic root of 261006432 is about 639.0729024560.

Adding to 261006432 its reverse (234600162), we get a palindrome (495606594).

The spelling of 261006432 in words is "two hundred sixty-one million, six thousand, four hundred thirty-two".