121808448 has 70 divisors (see below), whose sum is σ = 361093766. Its totient is φ = 40601088.

The previous prime is 121808431. The next prime is 121808459. The reversal of 121808448 is 844808121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 115089984 + 6718464 = 10728^2 + 2592^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6565 + ... + 16932.

Almost surely, 2^121808448 is an apocalyptic number.

121808448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121808448 is an abundant number, since it is smaller than the sum of its proper divisors (239285318).

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

121808448 is an equidigital number, since it uses as much as digits as its factorization.

121808448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23521 (or 23502 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 121808448 is about 11036.6864592594. The cubic root of 121808448 is about 495.7078577931.

The spelling of 121808448 in words is "one hundred twenty-one million, eight hundred eight thousand, four hundred forty-eight".