123299872 has 48 divisors (see below), whose sum is σ = 254741760. Its totient is φ = 58634752.

The previous prime is 123299843. The next prime is 123299879. The reversal of 123299872 is 278992321.

It is not an unprimeable number, because it can be changed into a prime (123299879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171129 + ... + 171847.

It is an arithmetic number, because the mean of its divisors is an integer number (5307120).

Almost surely, 2^123299872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123299872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127370880).

123299872 is an abundant number, since it is smaller than the sum of its proper divisors (131441888).

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

123299872 is a wasteful number, since it uses less digits than its factorization.

123299872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 977 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 123299872 is about 11104.0475503305. The cubic root of 123299872 is about 497.7228071974.

It can be divided in two parts, 12329 and 9872, that added together give a square (22201 = 149²).

The spelling of 123299872 in words is "one hundred twenty-three million, two hundred ninety-nine thousand, eight hundred seventy-two".