540405620 has 24 divisors (see below), whose sum is σ = 1136717064. Its totient is φ = 215806976.

The previous prime is 540405601. The next prime is 540405629. The reversal of 540405620 is 26504045.

It can be written as a sum of positive squares in 4 ways, for example, as 46321636 + 494083984 = 6806^2 + 22228^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 540405620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540405629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9557 + ... + 34236.

It is an arithmetic number, because the mean of its divisors is an integer number (47363211).

Almost surely, 2^540405620 is an apocalyptic number.

It is an amenable number.

540405620 is an abundant number, since it is smaller than the sum of its proper divisors (596311444).

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

540405620 is a wasteful number, since it uses less digits than its factorization.

540405620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44419 (or 44417 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 540405620 is about 23246.6259917434. The cubic root of 540405620 is about 814.5291269251.

Adding to 540405620 its reverse (26504045), we get a palindrome (566909665).

The spelling of 540405620 in words is "five hundred forty million, four hundred five thousand, six hundred twenty".