261830622 has 8 divisors (see below), whose sum is σ = 523661256. Its totient is φ = 87276872.

The previous prime is 261830603. The next prime is 261830623. The reversal of 261830622 is 226038162.

It is a sphenic number, since it is the product of 3 distinct primes.

261830622 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 261830622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261830623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21819213 + ... + 21819224.

It is an arithmetic number, because the mean of its divisors is an integer number (65457657).

Almost surely, 2^261830622 is an apocalyptic number.

261830622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261830622 is a wasteful number, since it uses less digits than its factorization.

261830622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43638442.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 261830622 is about 16181.1811064582. The cubic root of 261830622 is about 639.7448706396.

Adding to 261830622 its reverse (226038162), we get a palindrome (487868784).

The spelling of 261830622 in words is "two hundred sixty-one million, eight hundred thirty thousand, six hundred twenty-two".