123136464 has 80 divisors (see below), whose sum is σ = 358262784. Its totient is φ = 36105600.

The previous prime is 123136451. The next prime is 123136471. The reversal of 123136464 is 464631321.

It is a nude number because it is divisible by every one of its digits.

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, 12607 + ... + 20129.

Almost surely, 2^123136464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123136464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179131392).

123136464 is an abundant number, since it is smaller than the sum of its proper divisors (235126320).

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

123136464 is a wasteful number, since it uses less digits than its factorization.

123136464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576 (or 7570 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 123136464 is about 11096.6870731764. The cubic root of 123136464 is about 497.5028344241.

Adding to 123136464 its reverse (464631321), we get a palindrome (587767785).

The spelling of 123136464 in words is "one hundred twenty-three million, one hundred thirty-six thousand, four hundred sixty-four".