540421400 has 24 divisors (see below), whose sum is σ = 1256480220. Its totient is φ = 216168480.

The previous prime is 540421391. The next prime is 540421403. The reversal of 540421400 is 4124045.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540421403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1350854 + ... + 1351253.

Almost surely, 2^540421400 is an apocalyptic number.

540421400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

540421400 is an abundant number, since it is smaller than the sum of its proper divisors (716058820).

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

540421400 is a wasteful number, since it uses less digits than its factorization.

540421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702123 (or 2702114 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 540421400 is about 23246.9653933583. The cubic root of 540421400 is about 814.5370550097.

Adding to 540421400 its reverse (4124045), we get a palindrome (544545445).

The spelling of 540421400 in words is "five hundred forty million, four hundred twenty-one thousand, four hundred".