1896639 has 8 divisors (see below), whose sum is σ = 2677680. Its totient is φ = 1190016.

The previous prime is 1896617. The next prime is 1896647. The reversal of 1896639 is 9366981.

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

It is not a de Polignac number, because 1896639 - 2⁵ = 1896607 is a prime.

1896639 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1896639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18544 + ... + 18645.

It is an arithmetic number, because the mean of its divisors is an integer number (334710).

2^1896639 is an apocalyptic number.

1896639 is a deficient number, since it is larger than the sum of its proper divisors (781041).

1896639 is a wasteful number, since it uses less digits than its factorization.

1896639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37209.

The product of its digits is 69984, while the sum is 42.

The square root of 1896639 is about 1377.1851727346. The cubic root of 1896639 is about 123.7831581384.

The spelling of 1896639 in words is "one million, eight hundred ninety-six thousand, six hundred thirty-nine".