261140808 has 128 divisors (see below), whose sum is σ = 721768320. Its totient is φ = 78397440.

The previous prime is 261140801. The next prime is 261140809. The reversal of 261140808 is 808041162.

261140808 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261140801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120660 + ... + 1120892.

It is an arithmetic number, because the mean of its divisors is an integer number (5638815).

Almost surely, 2^261140808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261140808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360884160).

261140808 is an abundant number, since it is smaller than the sum of its proper divisors (460627512).

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

261140808 is a wasteful number, since it uses less digits than its factorization.

261140808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 261140808 is about 16159.8517319931. The cubic root of 261140808 is about 639.1825566211.

The spelling of 261140808 in words is "two hundred sixty-one million, one hundred forty thousand, eight hundred eight".