261430446 has 16 divisors (see below), whose sum is σ = 524416464. Its totient is φ = 86884224.

The previous prime is 261430439. The next prime is 261430451. The reversal of 261430446 is 644034162.

It is a Curzon number.

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, 62625 + ... + 66668.

It is an arithmetic number, because the mean of its divisors is an integer number (32776029).

Almost surely, 2^261430446 is an apocalyptic number.

261430446 is an abundant number, since it is smaller than the sum of its proper divisors (262986018).

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

261430446 is a wasteful number, since it uses less digits than its factorization.

261430446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129635.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 261430446 is about 16168.8109024752. The cubic root of 261430446 is about 639.4187805905.

The spelling of 261430446 in words is "two hundred sixty-one million, four hundred thirty thousand, four hundred forty-six".