121847928 has 64 divisors (see below), whose sum is σ = 322444800. Its totient is φ = 38290560.

The previous prime is 121847911. The next prime is 121847953. The reversal of 121847928 is 829748121.

It is a self number, because there is not a number n which added to its sum of digits gives 121847928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37638 + ... + 40746.

It is an arithmetic number, because the mean of its divisors is an integer number (5038200).

Almost surely, 2^121847928 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 121847928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161222400).

121847928 is an abundant number, since it is smaller than the sum of its proper divisors (200596872).

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

121847928 is a wasteful number, since it uses less digits than its factorization.

121847928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212 (or 3208 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 121847928 is about 11038.4748946582. The cubic root of 121847928 is about 495.7614075333.

The spelling of 121847928 in words is "one hundred twenty-one million, eight hundred forty-seven thousand, nine hundred twenty-eight".