261828162 has 24 divisors (see below), whose sum is σ = 578000124. Its totient is φ = 85629024.

The previous prime is 261828157. The next prime is 261828167.

261828162 is a `hidden beast` number, since 2 + 618 + 28 + 16 + 2 = 666.

261828162 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (261828157) and next prime (261828167).

It can be written as a sum of positive squares in 2 ways, for example, as 261760041 + 68121 = 16179^2 + 261^2 .

It is not an unprimeable number, because it can be changed into a prime (261828167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136273 + ... + 138180.

Almost surely, 2^261828162 is an apocalyptic number.

261828162 is an abundant number, since it is smaller than the sum of its proper divisors (316171962).

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

261828162 is a wasteful number, since it uses less digits than its factorization.

261828162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274514 (or 274511 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 261828162 is about 16181.1050920510. The cubic root of 261828162 is about 639.7428670831.

The spelling of 261828162 in words is "two hundred sixty-one million, eight hundred twenty-eight thousand, one hundred sixty-two".