123257886 has 16 divisors (see below), whose sum is σ = 246656784. Its totient is φ = 41062464.

The previous prime is 123257879. The next prime is 123257899. The reversal of 123257886 is 688752321.

It is a super-2 number, since 2×123257886² = 30385012922377992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8016 + ... + 17628.

It is an arithmetic number, because the mean of its divisors is an integer number (15416049).

Almost surely, 2^123257886 is an apocalyptic number.

123257886 is an abundant number, since it is smaller than the sum of its proper divisors (123398898).

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

123257886 is a wasteful number, since it uses less digits than its factorization.

123257886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11755.

The product of its digits is 161280, while the sum is 42.

The square root of 123257886 is about 11102.1568174837. The cubic root of 123257886 is about 497.6663060243. Note that the first 3 decimals are identical.

The spelling of 123257886 in words is "one hundred twenty-three million, two hundred fifty-seven thousand, eight hundred eighty-six".