123464640 has 168 divisors, whose sum is σ = 425031408. Its totient is φ = 30351360.

The previous prime is 123464617. The next prime is 123464651. The reversal of 123464640 is 46464321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 123464598 and 123464607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161860 + ... + 162620.

Almost surely, 2^123464640 is an apocalyptic number.

123464640 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 123464640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212515704).

123464640 is an abundant number, since it is smaller than the sum of its proper divisors (301566768).

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

123464640 is a wasteful number, since it uses less digits than its factorization.

123464640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 123464640 is about 11111.4643499406. The cubic root of 123464640 is about 497.9444140471.

The spelling of 123464640 in words is "one hundred twenty-three million, four hundred sixty-four thousand, six hundred forty".