481138920 has 64 divisors (see below), whose sum is σ = 1603800000. Its totient is φ = 128303424.

The previous prime is 481138877. The next prime is 481138927. The reversal of 481138920 is 29831184.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (481138927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221670 + ... + 223829.

It is an arithmetic number, because the mean of its divisors is an integer number (25059375).

Almost surely, 2^481138920 is an apocalyptic number.

481138920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

481138920 is an abundant number, since it is smaller than the sum of its proper divisors (1122661080).

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

481138920 is a wasteful number, since it uses less digits than its factorization.

481138920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445519 (or 445509 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 481138920 is about 21934.8790742051. The cubic root of 481138920 is about 783.5923059030.

The spelling of 481138920 in words is "four hundred eighty-one million, one hundred thirty-eight thousand, nine hundred twenty".