261050860 has 24 divisors (see below), whose sum is σ = 626522400. Its totient is φ = 89503104.

The previous prime is 261050843. The next prime is 261050863. The reversal of 261050860 is 68050162.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (261050863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932185 + ... + 932464.

It is an arithmetic number, because the mean of its divisors is an integer number (26105100).

Almost surely, 2^261050860 is an apocalyptic number.

261050860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261050860 is an abundant number, since it is smaller than the sum of its proper divisors (365471540).

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

261050860 is a wasteful number, since it uses less digits than its factorization.

261050860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864665 (or 1864663 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 261050860 is about 16157.0684222108. The cubic root of 261050860 is about 639.1091609751.

The spelling of 261050860 in words is "two hundred sixty-one million, fifty thousand, eight hundred sixty".