261043470 has 48 divisors (see below), whose sum is σ = 714439440. Its totient is φ = 65947392.

The previous prime is 261043469. The next prime is 261043493. The reversal of 261043470 is 74340162.

261043470 is a `hidden beast` number, since 2 + 610 + 4 + 3 + 47 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74619 + ... + 78038.

It is an arithmetic number, because the mean of its divisors is an integer number (14884155).

Almost surely, 2^261043470 is an apocalyptic number.

261043470 is an abundant number, since it is smaller than the sum of its proper divisors (453395970).

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

261043470 is a wasteful number, since it uses less digits than its factorization.

261043470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152689 (or 152686 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 261043470 is about 16156.8397281151. The cubic root of 261043470 is about 639.1031301435.

The spelling of 261043470 in words is "two hundred sixty-one million, forty-three thousand, four hundred seventy".