1639920248 has 32 divisors (see below), whose sum is σ = 3239082000. Its totient is φ = 776229120.

The previous prime is 1639920239. The next prime is 1639920251. The reversal of 1639920248 is 8420299361.

It is a junction number, because it is equal to n+sod(n) for n = 1639920199 and 1639920208.

It is a congruent number.

It is an unprimeable number.

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, 258458 + ... + 264726.

Almost surely, 2^1639920248 is an apocalyptic number.

It is an amenable number.

1639920248 is a deficient number, since it is larger than the sum of its proper divisors (1599161752).

1639920248 is a wasteful number, since it uses less digits than its factorization.

1639920248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8015 (or 8011 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1639920248 is about 40495.9287830271. The cubic root of 1639920248 is about 1179.2545919450.

The spelling of 1639920248 in words is "one billion, six hundred thirty-nine million, nine hundred twenty thousand, two hundred forty-eight".