121724328 has 64 divisors (see below), whose sum is σ = 333835200. Its totient is φ = 36679680.

The previous prime is 121724311. The next prime is 121724329. The reversal of 121724328 is 823427121.

It is a junction number, because it is equal to n+sod(n) for n = 121724295 and 121724304.

It is not an unprimeable number, because it can be changed into a prime (121724329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49758 + ... + 52146.

It is an arithmetic number, because the mean of its divisors is an integer number (5216175).

Almost surely, 2^121724328 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 121724328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166917600).

121724328 is an abundant number, since it is smaller than the sum of its proper divisors (212110872).

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

121724328 is a wasteful number, since it uses less digits than its factorization.

121724328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602 (or 2598 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 121724328 is about 11032.8748746644. The cubic root of 121724328 is about 495.5937208063.

The spelling of 121724328 in words is "one hundred twenty-one million, seven hundred twenty-four thousand, three hundred twenty-eight".