261040476 has 48 divisors (see below), whose sum is σ = 637416864. Its totient is φ = 83056896.

The previous prime is 261040469. The next prime is 261040489. The reversal of 261040476 is 674040162.

It is a super-2 number, since 2×261040476² = 136284260220613152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17986 + ... + 29078.

It is an arithmetic number, because the mean of its divisors is an integer number (13279518).

Almost surely, 2^261040476 is an apocalyptic number.

It is an amenable number.

261040476 is an abundant number, since it is smaller than the sum of its proper divisors (376376388).

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

261040476 is a wasteful number, since it uses less digits than its factorization.

261040476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11190 (or 11188 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 261040476 is about 16156.7470735913. The cubic root of 261040476 is about 639.1006867675.

The spelling of 261040476 in words is "two hundred sixty-one million, forty thousand, four hundred seventy-six".