1948639 has 8 divisors (see below), whose sum is σ = 2429568. Its totient is φ = 1518360.

The previous prime is 1948637. The next prime is 1948649. The reversal of 1948639 is 9368491.

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

It is a cyclic number.

It is not a de Polignac number, because 1948639 - 2¹ = 1948637 is a prime.

It is a Duffinian number.

1948639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12577 + ... + 12730.

It is an arithmetic number, because the mean of its divisors is an integer number (303696).

2^1948639 is an apocalyptic number.

1948639 is a deficient number, since it is larger than the sum of its proper divisors (480929).

1948639 is a wasteful number, since it uses less digits than its factorization.

1948639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25325.

The product of its digits is 46656, while the sum is 40.

The square root of 1948639 is about 1395.9366031450. The cubic root of 1948639 is about 124.9042253031.

The spelling of 1948639 in words is "one million, nine hundred forty-eight thousand, six hundred thirty-nine".