261787476 has 24 divisors (see below), whose sum is σ = 612773280. Its totient is φ = 86985952.

The previous prime is 261787447. The next prime is 261787481. The reversal of 261787476 is 674787162.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 30606 + ... + 38213.

It is an arithmetic number, because the mean of its divisors is an integer number (25532220).

Almost surely, 2^261787476 is an apocalyptic number.

It is an amenable number.

261787476 is an abundant number, since it is smaller than the sum of its proper divisors (350985804).

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

261787476 is a wasteful number, since it uses less digits than its factorization.

261787476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69143 (or 69141 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 261787476 is about 16179.8478361201. The cubic root of 261787476 is about 639.7097283934.

The spelling of 261787476 in words is "two hundred sixty-one million, seven hundred eighty-seven thousand, four hundred seventy-six".