548409440 has 72 divisors (see below), whose sum is σ = 1328639760. Its totient is φ = 213908480.

The previous prime is 548409439. The next prime is 548409451. The reversal of 548409440 is 44904845.

It is a super-2 number, since 2×548409440² = 601505827762227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 548409394 and 548409403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267941 + ... + 269979.

It is an arithmetic number, because the mean of its divisors is an integer number (18453330).

Almost surely, 2^548409440 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 548409440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664319880).

548409440 is an abundant number, since it is smaller than the sum of its proper divisors (780230320).

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

548409440 is a wasteful number, since it uses less digits than its factorization.

548409440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 548409440 is about 23418.1433935314. The cubic root of 548409440 is about 818.5307021789.

The spelling of 548409440 in words is "five hundred forty-eight million, four hundred nine thousand, four hundred forty".