19428894 has 12 divisors (see below), whose sum is σ = 42095976. Its totient is φ = 6476292.

The previous prime is 19428883. The next prime is 19428901. The reversal of 19428894 is 49882491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539674 + ... + 539709.

It is an arithmetic number, because the mean of its divisors is an integer number (3507998).

Almost surely, 2^19428894 is an apocalyptic number.

19428894 is an abundant number, since it is smaller than the sum of its proper divisors (22667082).

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

19428894 is a wasteful number, since it uses less digits than its factorization.

19428894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079391 (or 1079388 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 19428894 is about 4407.8219111030. The cubic root of 19428894 is about 268.8330708407.

The spelling of 19428894 in words is "nineteen million, four hundred twenty-eight thousand, eight hundred ninety-four".