19628964 has 36 divisors (see below), whose sum is σ = 49855260. Its totient is φ = 6511680.

The previous prime is 19628929. The next prime is 19628971. The reversal of 19628964 is 46982691.

It is a happy number.

19628964 is a `hidden beast` number, since 19 + 628 + 9 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7518564 + 12110400 = 2742^2 + 3480^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 7054 + ... + 9434.

Almost surely, 2^19628964 is an apocalyptic number.

It is an amenable number.

19628964 is an abundant number, since it is smaller than the sum of its proper divisors (30226296).

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

19628964 is a wasteful number, since it uses less digits than its factorization.

19628964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620 (or 2615 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 19628964 is about 4430.4586670005. The cubic root of 19628964 is about 269.7526953629.

The spelling of 19628964 in words is "nineteen million, six hundred twenty-eight thousand, nine hundred sixty-four".