128120450 has 24 divisors (see below), whose sum is σ = 239234688. Its totient is φ = 51048080.

The previous prime is 128120437. The next prime is 128120471. The reversal of 128120450 is 54021821.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8279 + ... + 18021.

It is an arithmetic number, because the mean of its divisors is an integer number (9968112).

Almost surely, 2^128120450 is an apocalyptic number.

128120450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128120450 is a deficient number, since it is larger than the sum of its proper divisors (111114238).

128120450 is a wasteful number, since it uses less digits than its factorization.

128120450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018 (or 10013 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 128120450 is about 11319.0304355099. The cubic root of 128120450 is about 504.1264511176.

The spelling of 128120450 in words is "one hundred twenty-eight million, one hundred twenty thousand, four hundred fifty".