19798764 has 24 divisors (see below), whose sum is σ = 47790960. Its totient is φ = 6371904.

The previous prime is 19798759. The next prime is 19798769. The reversal of 19798764 is 46789791.

It is an interprime number because it is at equal distance from previous prime (19798759) and next prime (19798769).

It is not an unprimeable number, because it can be changed into a prime (19798769) 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, 28099 + ... + 28794.

It is an arithmetic number, because the mean of its divisors is an integer number (1991290).

Almost surely, 2^19798764 is an apocalyptic number.

It is an amenable number.

19798764 is an abundant number, since it is smaller than the sum of its proper divisors (27992196).

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

19798764 is a wasteful number, since it uses less digits than its factorization.

19798764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56929 (or 56927 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 19798764 is about 4449.5802049182. The cubic root of 19798764 is about 270.5282934907.

The spelling of 19798764 in words is "nineteen million, seven hundred ninety-eight thousand, seven hundred sixty-four".