540393891 has 16 divisors (see below), whose sum is σ = 753192960. Its totient is φ = 344223360.

The previous prime is 540393869. The next prime is 540393923. The reversal of 540393891 is 198393045.

It is not a de Polignac number, because 540393891 - 2⁹ = 540393379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (540393811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29430 + ... + 44123.

It is an arithmetic number, because the mean of its divisors is an integer number (47074560).

Almost surely, 2^540393891 is an apocalyptic number.

540393891 is a deficient number, since it is larger than the sum of its proper divisors (212799069).

540393891 is a wasteful number, since it uses less digits than its factorization.

540393891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73666.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 540393891 is about 23246.3737172059. The cubic root of 540393891 is about 814.5232340174.

The spelling of 540393891 in words is "five hundred forty million, three hundred ninety-three thousand, eight hundred ninety-one".