19620128 has 48 divisors (see below), whose sum is σ = 42547680. Its totient is φ = 8832000.

The previous prime is 19620119. The next prime is 19620143. The reversal of 19620128 is 82102691.

It is a self number, because there is not a number n which added to its sum of digits gives 19620128.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48728 + ... + 49128.

It is an arithmetic number, because the mean of its divisors is an integer number (886410).

Almost surely, 2^19620128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19620128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21273840).

19620128 is an abundant number, since it is smaller than the sum of its proper divisors (22927552).

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

19620128 is a wasteful number, since it uses less digits than its factorization.

19620128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 19620128 is about 4429.4613668030. The cubic root of 19620128 is about 269.7122127958.

The spelling of 19620128 in words is "nineteen million, six hundred twenty thousand, one hundred twenty-eight".