260621440 has 32 divisors (see below), whose sum is σ = 623049660. Its totient is φ = 104248320.

The previous prime is 260621437. The next prime is 260621447. The reversal of 260621440 is 44126062.

It can be written as a sum of positive squares in 2 ways, for example, as 225480256 + 35141184 = 15016^2 + 5928^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (260621447) 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, 202971 + ... + 204250.

Almost surely, 2^260621440 is an apocalyptic number.

260621440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260621440 is an abundant number, since it is smaller than the sum of its proper divisors (362428220).

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

260621440 is an equidigital number, since it uses as much as digits as its factorization.

260621440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407240 (or 407228 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 260621440 is about 16143.7740321153. The cubic root of 260621440 is about 638.7585308608.

The spelling of 260621440 in words is "two hundred sixty million, six hundred twenty-one thousand, four hundred forty".