123496720 has 20 divisors (see below), whose sum is σ = 287130060. Its totient is φ = 49398656.

The previous prime is 123496717. The next prime is 123496727. The reversal of 123496720 is 27694321.

It can be written as a sum of positive squares in 2 ways, for example, as 61528336 + 61968384 = 7844^2 + 7872^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (123496727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771775 + ... + 771934.

It is an arithmetic number, because the mean of its divisors is an integer number (14356503).

Almost surely, 2^123496720 is an apocalyptic number.

123496720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123496720 is an abundant number, since it is smaller than the sum of its proper divisors (163633340).

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

123496720 is a wasteful number, since it uses less digits than its factorization.

123496720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543722 (or 1543716 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 123496720 is about 11112.9078102898. The cubic root of 123496720 is about 497.9875375235.

The spelling of 123496720 in words is "one hundred twenty-three million, four hundred ninety-six thousand, seven hundred twenty".