123466640 has 80 divisors (see below), whose sum is σ = 315354816. Its totient is φ = 44582400.

The previous prime is 123466639. The next prime is 123466643. The reversal of 123466640 is 46664321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×123466640² = 30488022385779200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123466597 and 123466606.

It is not an unprimeable number, because it can be changed into a prime (123466643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151835 + ... + 152645.

Almost surely, 2^123466640 is an apocalyptic number.

123466640 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 123466640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157677408).

123466640 is an abundant number, since it is smaller than the sum of its proper divisors (191888176).

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

123466640 is a wasteful number, since it uses less digits than its factorization.

123466640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 123466640 is about 11111.5543467150. The cubic root of 123466640 is about 497.9471027615.

The spelling of 123466640 in words is "one hundred twenty-three million, four hundred sixty-six thousand, six hundred forty".