120405456828 has 48 divisors (see below), whose sum is σ = 317279727520. Its totient is φ = 39477196800.

The previous prime is 120405456799. The next prime is 120405456839. The reversal of 120405456828 is 828654504021.

120405456828 is a `hidden beast` number, since 1 + 2 + 0 + 40 + 545 + 68 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9131653 + ... + 9144828.

Almost surely, 2^120405456828 is an apocalyptic number.

120405456828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

120405456828 is an abundant number, since it is smaller than the sum of its proper divisors (196874270692).

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

120405456828 is a wasteful number, since it uses less digits than its factorization.

120405456828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18276555 (or 18276547 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 120405456828 in words is "one hundred twenty billion, four hundred five million, four hundred fifty-six thousand, eight hundred twenty-eight".