260616690 has 160 divisors (see below), whose sum is σ = 737662464. Its totient is φ = 65940480.

The previous prime is 260616683. The next prime is 260616691. The reversal of 260616690 is 96616062.

It is a happy number.

It is a super-2 number, since 2×260616690² = 135842118213112200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (260616691) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2435617 + ... + 2435723.

Almost surely, 2^260616690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260616690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368831232).

260616690 is an abundant number, since it is smaller than the sum of its proper divisors (477045774).

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

260616690 is a wasteful number, since it uses less digits than its factorization.

260616690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 260616690 is about 16143.6269159071. The cubic root of 260616690 is about 638.7546502368.

The spelling of 260616690 in words is "two hundred sixty million, six hundred sixteen thousand, six hundred ninety".