538240889 has 4 divisors (see below), whose sum is σ = 539225424. Its totient is φ = 537256356.

The previous prime is 538240877. The next prime is 538240891. The reversal of 538240889 is 988042835.

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.

It is a cyclic number.

It is not a de Polignac number, because 538240889 - 2¹² = 538236793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538240819) 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, 491447 + ... + 492540.

It is an arithmetic number, because the mean of its divisors is an integer number (134806356).

Almost surely, 2^538240889 is an apocalyptic number.

It is an amenable number.

538240889 is a deficient number, since it is larger than the sum of its proper divisors (984535).

538240889 is an equidigital number, since it uses as much as digits as its factorization.

538240889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984534.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 538240889 is about 23200.0191594748. The cubic root of 538240889 is about 813.4400708517.

The spelling of 538240889 in words is "five hundred thirty-eight million, two hundred forty thousand, eight hundred eighty-nine".