261960492 has 12 divisors (see below), whose sum is σ = 611241176. Its totient is φ = 87320160.

The previous prime is 261960473. The next prime is 261960499. The reversal of 261960492 is 294069162.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 261960492.

It is not an unprimeable number, because it can be changed into a prime (261960499) 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, 10915009 + ... + 10915032.

Almost surely, 2^261960492 is an apocalyptic number.

It is an amenable number.

261960492 is an abundant number, since it is smaller than the sum of its proper divisors (349280684).

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

261960492 is a wasteful number, since it uses less digits than its factorization.

261960492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21830048 (or 21830046 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 261960492 is about 16185.1936040321. The cubic root of 261960492 is about 639.8506259466.

The spelling of 261960492 in words is "two hundred sixty-one million, nine hundred sixty thousand, four hundred ninety-two".