19428804 has 36 divisors (see below), whose sum is σ = 49791196. Its totient is φ = 6386688.

The previous prime is 19428797. The next prime is 19428817. The reversal of 19428804 is 40882491.

It can be written as a sum of positive squares in 2 ways, for example, as 6812100 + 12616704 = 2610^2 + 3552^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (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, 1069 + ... + 6324.

Almost surely, 2^19428804 is an apocalyptic number.

It is an amenable number.

19428804 is an abundant number, since it is smaller than the sum of its proper divisors (30362392).

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

19428804 is a wasteful number, since it uses less digits than its factorization.

19428804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7476 (or 7471 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 19428804 is about 4407.8117019673. The cubic root of 19428804 is about 268.8326557371.

The spelling of 19428804 in words is "nineteen million, four hundred twenty-eight thousand, eight hundred four".