540404401 has 4 divisors (see below), whose sum is σ = 543423600. Its totient is φ = 537385204.

The previous prime is 540404399. The next prime is 540404411. The reversal of 540404401 is 104404045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104404045 = 5 ⋅20880809.

It is a cyclic number.

It is not a de Polignac number, because 540404401 - 2¹ = 540404399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540404411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509331 + ... + 1509688.

It is an arithmetic number, because the mean of its divisors is an integer number (135855900).

Almost surely, 2^540404401 is an apocalyptic number.

It is an amenable number.

540404401 is a deficient number, since it is larger than the sum of its proper divisors (3019199).

540404401 is a wasteful number, since it uses less digits than its factorization.

540404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019198.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 540404401 is about 23246.5997728700. The cubic root of 540404401 is about 814.5285144766.

Adding to 540404401 its reverse (104404045), we get a palindrome (644808446).

The spelling of 540404401 in words is "five hundred forty million, four hundred four thousand, four hundred one".