540421890 has 16 divisors (see below), whose sum is σ = 1297012608. Its totient is φ = 144112496.

The previous prime is 540421879. The next prime is 540421919. The reversal of 540421890 is 98124045.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9007002 + ... + 9007061.

It is an arithmetic number, because the mean of its divisors is an integer number (81063288).

Almost surely, 2^540421890 is an apocalyptic number.

540421890 is an abundant number, since it is smaller than the sum of its proper divisors (756590718).

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

540421890 is a wasteful number, since it uses less digits than its factorization.

540421890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18014073.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 540421890 is about 23246.9759323659. The cubic root of 540421890 is about 814.5373011899.

The spelling of 540421890 in words is "five hundred forty million, four hundred twenty-one thousand, eight hundred ninety".