123497920 has 112 divisors (see below), whose sum is σ = 362029248. Its totient is φ = 39075840.

The previous prime is 123497909. The next prime is 123497939. The reversal of 123497920 is 29794321.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 123497920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27000 + ... + 31240.

It is an arithmetic number, because the mean of its divisors is an integer number (3232404).

Almost surely, 2^123497920 is an apocalyptic number.

123497920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181014624).

123497920 is an abundant number, since it is smaller than the sum of its proper divisors (238531328).

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

123497920 is a wasteful number, since it uses less digits than its factorization.

123497920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 123497920 is about 11112.9618014281. The cubic root of 123497920 is about 497.9891504763.

The spelling of 123497920 in words is "one hundred twenty-three million, four hundred ninety-seven thousand, nine hundred twenty".