540541998 has 80 divisors (see below), whose sum is σ = 1271255040. Its totient is φ = 171342864.

The previous prime is 540541993. The next prime is 540542003. The reversal of 540541998 is 899145045.

540541998 is a `hidden beast` number, since 540 + 5 + 4 + 19 + 98 = 666.

It is an interprime number because it is at equal distance from previous prime (540541993) and next prime (540542003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540541993) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 890211 + ... + 890817.

It is an arithmetic number, because the mean of its divisors is an integer number (15890688).

Almost surely, 2^540541998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 540541998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635627520).

540541998 is an abundant number, since it is smaller than the sum of its proper divisors (730713042).

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

540541998 is a wasteful number, since it uses less digits than its factorization.

540541998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 540541998 is about 23249.5590925936. The cubic root of 540541998 is about 814.5976399741.

The spelling of 540541998 in words is "five hundred forty million, five hundred forty-one thousand, nine hundred ninety-eight".