19790868 has 24 divisors (see below), whose sum is σ = 46357920. Its totient is φ = 6571360.

The previous prime is 19790863. The next prime is 19790887. The reversal of 19790868 is 86809791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19790861) 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, 163 + ... + 6293.

It is an arithmetic number, because the mean of its divisors is an integer number (1931580).

Almost surely, 2^19790868 is an apocalyptic number.

It is an amenable number.

19790868 is an abundant number, since it is smaller than the sum of its proper divisors (26567052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19790868 is a wasteful number, since it uses less digits than its factorization.

19790868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6407 (or 6405 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 19790868 is about 4448.6928417233. The cubic root of 19790868 is about 270.4923253290.

The spelling of 19790868 in words is "nineteen million, seven hundred ninety thousand, eight hundred sixty-eight".