261744492 has 24 divisors (see below), whose sum is σ = 625634352. Its totient is φ = 85120000.

The previous prime is 261744487. The next prime is 261744521. The reversal of 261744492 is 294447162.

It is a self number, because there is not a number n which added to its sum of digits gives 261744492.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265509 + ... + 266492.

It is an arithmetic number, because the mean of its divisors is an integer number (26068098).

Almost surely, 2^261744492 is an apocalyptic number.

It is an amenable number.

261744492 is an abundant number, since it is smaller than the sum of its proper divisors (363889860).

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

261744492 is a wasteful number, since it uses less digits than its factorization.

261744492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532049 (or 532047 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 261744492 is about 16178.5194625466. The cubic root of 261744492 is about 639.6747142559.

The spelling of 261744492 in words is "two hundred sixty-one million, seven hundred forty-four thousand, four hundred ninety-two".