120399728820 has 192 divisors, whose sum is σ = 400096198656. Its totient is φ = 26472245760.

The previous prime is 120399728797. The next prime is 120399728831. The reversal of 120399728820 is 28827993021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2146654 + ... + 2202026.

It is an arithmetic number, because the mean of its divisors is an integer number (2083834368).

Almost surely, 2^120399728820 is an apocalyptic number.

120399728820 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 120399728820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200048099328).

120399728820 is an abundant number, since it is smaller than the sum of its proper divisors (279696469836).

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

120399728820 is a wasteful number, since it uses less digits than its factorization.

120399728820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55590 (or 55588 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 120399728820 in words is "one hundred twenty billion, three hundred ninety-nine million, seven hundred twenty-eight thousand, eight hundred twenty".