120405800 has 24 divisors (see below), whose sum is σ = 279943950. Its totient is φ = 48162240.

The previous prime is 120405797. The next prime is 120405811. The reversal of 120405800 is 8504021.

It can be written as a sum of positive squares in 3 ways, for example, as 53787556 + 66618244 = 7334^2 + 8162^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300815 + ... + 301214.

Almost surely, 2^120405800 is an apocalyptic number.

120405800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120405800 is an abundant number, since it is smaller than the sum of its proper divisors (159538150).

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

120405800 is a wasteful number, since it uses less digits than its factorization.

120405800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602045 (or 602036 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 120405800 is about 10972.9576687418. The cubic root of 120405800 is about 493.7977831233.

Adding to 120405800 its reverse (8504021), we get a palindrome (128909821).

The spelling of 120405800 in words is "one hundred twenty million, four hundred five thousand, eight hundred".