19874028 has 12 divisors (see below), whose sum is σ = 46372760. Its totient is φ = 6624672.

The previous prime is 19874021. The next prime is 19874083. The reversal of 19874028 is 82047891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19874021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828073 + ... + 828096.

Almost surely, 2^19874028 is an apocalyptic number.

It is an amenable number.

19874028 is an abundant number, since it is smaller than the sum of its proper divisors (26498732).

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

19874028 is a wasteful number, since it uses less digits than its factorization.

19874028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656176 (or 1656174 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 19874028 is about 4458.0296095921. The cubic root of 19874028 is about 270.8706599021.

The spelling of 19874028 in words is "nineteen million, eight hundred seventy-four thousand, twenty-eight".