540447807 has 4 divisors (see below), whose sum is σ = 720597080. Its totient is φ = 360298536.

The previous prime is 540447797. The next prime is 540447821. The reversal of 540447807 is 708744045.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-540447807 is a prime.

It is a super-2 number, since 2×540447807² = 584167664182218498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540443807) 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, 90074632 + ... + 90074637.

It is an arithmetic number, because the mean of its divisors is an integer number (180149270).

Almost surely, 2^540447807 is an apocalyptic number.

540447807 is a deficient number, since it is larger than the sum of its proper divisors (180149273).

540447807 is a wasteful number, since it uses less digits than its factorization.

540447807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180149272.

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 540447807 is about 23247.5333530248. The cubic root of 540447807 is about 814.5503218972.

The spelling of 540447807 in words is "five hundred forty million, four hundred forty-seven thousand, eight hundred seven".