120828728920 has 32 divisors (see below), whose sum is σ = 278187077520. Its totient is φ = 47207502720.

The previous prime is 120828728873. The next prime is 120828728921. The reversal of 120828728920 is 29827828021.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120828728921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35122911 + ... + 35126350.

Almost surely, 2^120828728920 is an apocalyptic number.

120828728920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120828728920 is an abundant number, since it is smaller than the sum of its proper divisors (157358348600).

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

120828728920 is a wasteful number, since it uses less digits than its factorization.

120828728920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70249315 (or 70249311 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 120828728920 in words is "one hundred twenty billion, eight hundred twenty-eight million, seven hundred twenty-eight thousand, nine hundred twenty".