121824428 has 24 divisors (see below), whose sum is σ = 244816320. Its totient is φ = 52459920.

The previous prime is 121824421. The next prime is 121824433. The reversal of 121824428 is 824428121.

It is a junction number, because it is equal to n+sod(n) for n = 121824394 and 121824403.

It is not an unprimeable number, because it can be changed into a prime (121824421) 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 7 ways as a sum of consecutive naturals, for example, 72026 + ... + 73697.

It is an arithmetic number, because the mean of its divisors is an integer number (10200680).

Almost surely, 2^121824428 is an apocalyptic number.

It is an amenable number.

121824428 is an abundant number, since it is smaller than the sum of its proper divisors (122991892).

121824428 is a wasteful number, since it uses less digits than its factorization.

121824428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145757 (or 145755 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 121824428 is about 11037.4103846872. The cubic root of 121824428 is about 495.7295340816.

The spelling of 121824428 in words is "one hundred twenty-one million, eight hundred twenty-four thousand, four hundred twenty-eight".