19789056 has 144 divisors (see below), whose sum is σ = 67043200. Its totient is φ = 5640192.

The previous prime is 19789027. The next prime is 19789069. The reversal of 19789056 is 65098791.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×19789056² = 783213474742272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48180 + ... + 48588.

Almost surely, 2^19789056 is an apocalyptic number.

19789056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19789056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33521600).

19789056 is an abundant number, since it is smaller than the sum of its proper divisors (47254144).

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

19789056 is an equidigital number, since it uses as much as digits as its factorization.

19789056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 19789056 is about 4448.4891817335. The cubic root of 19789056 is about 270.4840698876.

It can be divided in two parts, 197 and 89056, that added together give a triangular number (89253 = T₄₂₂).

The spelling of 19789056 in words is "nineteen million, seven hundred eighty-nine thousand, fifty-six".