123263720 has 32 divisors (see below), whose sum is σ = 280211400. Its totient is φ = 48795648.

The previous prime is 123263713. The next prime is 123263731. The reversal of 123263720 is 27362321.

It can be written as a sum of positive squares in 4 ways, for example, as 82482724 + 40780996 = 9082^2 + 6386^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123263720.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12005 + ... + 19764.

Almost surely, 2^123263720 is an apocalyptic number.

123263720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123263720 is an abundant number, since it is smaller than the sum of its proper divisors (156947680).

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

123263720 is a wasteful number, since it uses less digits than its factorization.

123263720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31877 (or 31873 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 123263720 is about 11102.4195561148. The cubic root of 123263720 is about 497.6741576908.

The spelling of 123263720 in words is "one hundred twenty-three million, two hundred sixty-three thousand, seven hundred twenty".