123256284 has 24 divisors (see below), whose sum is σ = 291650688. Its totient is φ = 40506480.

The previous prime is 123256277. The next prime is 123256321. The reversal of 123256284 is 482652321.

It is a super-2 number, since 2×123256284² = 30384223090977312, 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71482 + ... + 73185.

It is an arithmetic number, because the mean of its divisors is an integer number (12152112).

Almost surely, 2^123256284 is an apocalyptic number.

It is an amenable number.

123256284 is an abundant number, since it is smaller than the sum of its proper divisors (168394404).

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

123256284 is a wasteful number, since it uses less digits than its factorization.

123256284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144745 (or 144743 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 123256284 is about 11102.0846691061. The cubic root of 123256284 is about 497.6641499354.

The spelling of 123256284 in words is "one hundred twenty-three million, two hundred fifty-six thousand, two hundred eighty-four".