261947048 has 16 divisors (see below), whose sum is σ = 535800960. Its totient is φ = 119066800.

The previous prime is 261947017. The next prime is 261947051. The reversal of 261947048 is 840749162.

It is a junction number, because it is equal to n+sod(n) for n = 261946996 and 261947014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1488248 + ... + 1488423.

It is an arithmetic number, because the mean of its divisors is an integer number (33487560).

Almost surely, 2^261947048 is an apocalyptic number.

It is an amenable number.

261947048 is an abundant number, since it is smaller than the sum of its proper divisors (273853912).

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

261947048 is a wasteful number, since it uses less digits than its factorization.

261947048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976688 (or 2976684 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 261947048 is about 16184.7782808415. The cubic root of 261947048 is about 639.8396798952.

The spelling of 261947048 in words is "two hundred sixty-one million, nine hundred forty-seven thousand, forty-eight".