121823840 has 24 divisors (see below), whose sum is σ = 287809200. Its totient is φ = 48729472.

The previous prime is 121823837. The next prime is 121823851. The reversal of 121823840 is 48328121.

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 3 ways as a sum of consecutive naturals, for example, 380540 + ... + 380859.

It is an arithmetic number, because the mean of its divisors is an integer number (11992050).

Almost surely, 2^121823840 is an apocalyptic number.

121823840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121823840 is an abundant number, since it is smaller than the sum of its proper divisors (165985360).

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

121823840 is an equidigital number, since it uses as much as digits as its factorization.

121823840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761414 (or 761406 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 121823840 is about 11037.3837479722. The cubic root of 121823840 is about 495.7287365146.

The spelling of 121823840 in words is "one hundred twenty-one million, eight hundred twenty-three thousand, eight hundred forty".