261882798 has 16 divisors (see below), whose sum is σ = 525715920. Its totient is φ = 86969216.

The previous prime is 261882793. The next prime is 261882839. The reversal of 261882798 is 897288162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261882798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261882791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79515 + ... + 82742.

It is an arithmetic number, because the mean of its divisors is an integer number (32857245).

Almost surely, 2^261882798 is an apocalyptic number.

261882798 is an abundant number, since it is smaller than the sum of its proper divisors (263833122).

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

261882798 is a wasteful number, since it uses less digits than its factorization.

261882798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162531.

The product of its digits is 774144, while the sum is 51.

The square root of 261882798 is about 16182.7932693957. The cubic root of 261882798 is about 639.7873626282.

The spelling of 261882798 in words is "two hundred sixty-one million, eight hundred eighty-two thousand, seven hundred ninety-eight".