548405988 has 96 divisors (see below), whose sum is σ = 1420231680. Its totient is φ = 163658880.

The previous prime is 548405953. The next prime is 548405989. The reversal of 548405988 is 889504845.

It is a super-2 number, since 2×548405988² = 601498255348512288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 548405988.

It is not an unprimeable number, because it can be changed into a prime (548405989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 741723 + ... + 742461.

It is an arithmetic number, because the mean of its divisors is an integer number (14794080).

Almost surely, 2^548405988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 548405988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710115840).

548405988 is an abundant number, since it is smaller than the sum of its proper divisors (871825692).

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

548405988 is a wasteful number, since it uses less digits than its factorization.

548405988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 51.

The square root of 548405988 is about 23418.0696898784. The cubic root of 548405988 is about 818.5289847431.

The spelling of 548405988 in words is "five hundred forty-eight million, four hundred five thousand, nine hundred eighty-eight".