260421930 has 48 divisors (see below), whose sum is σ = 682071624. Its totient is φ = 68935680.

The previous prime is 260421919. The next prime is 260421937. The reversal of 260421930 is 39124062.

260421930 is a `hidden beast` number, since 2 + 604 + 21 + 9 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 237868929 + 22553001 = 15423^2 + 4749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 260421894 and 260421903.

It is not an unprimeable number, because it can be changed into a prime (260421937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1770 + ... + 22890.

Almost surely, 2^260421930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260421930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341035812).

260421930 is an abundant number, since it is smaller than the sum of its proper divisors (421649694).

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

260421930 is a wasteful number, since it uses less digits than its factorization.

260421930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21271 (or 21268 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 260421930 is about 16137.5936867923. The cubic root of 260421930 is about 638.5954958638.

Adding to 260421930 its reverse (39124062), we get a palindrome (299545992).

It can be divided in two parts, 26042 and 1930, that added together give a palindrome (27972).

The spelling of 260421930 in words is "two hundred sixty million, four hundred twenty-one thousand, nine hundred thirty".