1538889 has 8 divisors (see below), whose sum is σ = 2238432. Its totient is φ = 932640.

The previous prime is 1538879. The next prime is 1538893. The reversal of 1538889 is 9888351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1538889 - 2⁸ = 1538633 is a prime.

1538889 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1538889.

It is not an unprimeable number, because it can be changed into a prime (1538839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23284 + ... + 23349.

It is an arithmetic number, because the mean of its divisors is an integer number (279804).

2^1538889 is an apocalyptic number.

It is an amenable number.

1538889 is a deficient number, since it is larger than the sum of its proper divisors (699543).

1538889 is a wasteful number, since it uses less digits than its factorization.

1538889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46647.

The product of its digits is 69120, while the sum is 42.

The square root of 1538889 is about 1240.5196491793. The cubic root of 1538889 is about 115.4522581495.

The spelling of 1538889 in words is "one million, five hundred thirty-eight thousand, eight hundred eighty-nine".