1639948 has 6 divisors (see below), whose sum is σ = 2869916. Its totient is φ = 819972.

The previous prime is 1639927. The next prime is 1639949. The reversal of 1639948 is 8499361.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1639948.

It is not an unprimeable number, because it can be changed into a prime (1639949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204990 + ... + 204997.

2^1639948 is an apocalyptic number.

It is an amenable number.

1639948 is a deficient number, since it is larger than the sum of its proper divisors (1229968).

1639948 is a wasteful number, since it uses less digits than its factorization.

1639948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409991 (or 409989 counting only the distinct ones).

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

The square root of 1639948 is about 1280.6045447366. The cubic root of 1639948 is about 117.9261243994.

The spelling of 1639948 in words is "one million, six hundred thirty-nine thousand, nine hundred forty-eight".