543631440 has 160 divisors (see below), whose sum is σ = 1946768256. Its totient is φ = 124026880.

The previous prime is 543631411. The next prime is 543631453. The reversal of 543631440 is 44136345.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 543631398 and 543631407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38824 + ... + 50936.

Almost surely, 2^543631440 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 543631440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973384128).

543631440 is an abundant number, since it is smaller than the sum of its proper divisors (1403136816).

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

543631440 is a wasteful number, since it uses less digits than its factorization.

543631440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12157 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 543631440 is about 23315.9053008885. The cubic root of 543631440 is about 816.1466239789.

Adding to 543631440 its reverse (44136345), we get a palindrome (587767785).

The spelling of 543631440 in words is "five hundred forty-three million, six hundred thirty-one thousand, four hundred forty".