120551328 has 144 divisors (see below), whose sum is σ = 365994720. Its totient is φ = 39004416.

The previous prime is 120551323. The next prime is 120551339. The reversal of 120551328 is 823155021.

It is a happy number.

120551328 is a `hidden beast` number, since 120 + 5 + 513 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (120551323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287503 + ... + 287921.

It is an arithmetic number, because the mean of its divisors is an integer number (2541630).

Almost surely, 2^120551328 is an apocalyptic number.

120551328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120551328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182997360).

120551328 is an abundant number, since it is smaller than the sum of its proper divisors (245443392).

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

120551328 is an equidigital number, since it uses as much as digits as its factorization.

120551328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 120551328 is about 10979.5868774740. The cubic root of 120551328 is about 493.9966452809.

The spelling of 120551328 in words is "one hundred twenty million, five hundred fifty-one thousand, three hundred twenty-eight".