120428259840 has 800 divisors, whose sum is σ = 496954085760. Its totient is φ = 27303837696.

The previous prime is 120428259839. The next prime is 120428259851. The reversal of 120428259840 is 48952824021.

120428259840 is a `hidden beast` number, since 12 + 0 + 4 + 2 + 8 + 2 + 598 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 236597506 + ... + 236598014.

Almost surely, 2^120428259840 is an apocalyptic number.

120428259840 is a gapful number since it is divisible by the number (10) 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 120428259840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248477042880).

120428259840 is an abundant number, since it is smaller than the sum of its proper divisors (376525825920).

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

120428259840 is an equidigital number, since it uses as much as digits as its factorization.

120428259840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 120428259840 in words is "one hundred twenty billion, four hundred twenty-eight million, two hundred fifty-nine thousand, eight hundred forty".