261404046 has 24 divisors (see below), whose sum is σ = 567201960. Its totient is φ = 87007536.

The previous prime is 261404041. The next prime is 261404089. The reversal of 261404046 is 640404162.

261404046 is a `hidden beast` number, since 2 + 614 + 0 + 4 + 0 + 46 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261404041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2521 + ... + 23003.

It is an arithmetic number, because the mean of its divisors is an integer number (23633415).

Almost surely, 2^261404046 is an apocalyptic number.

261404046 is an abundant number, since it is smaller than the sum of its proper divisors (305797914).

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

261404046 is a wasteful number, since it uses less digits than its factorization.

261404046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21200 (or 21197 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 261404046 is about 16167.9944952984. The cubic root of 261404046 is about 639.3972564155.

The spelling of 261404046 in words is "two hundred sixty-one million, four hundred four thousand, forty-six".