19878234 has 16 divisors (see below), whose sum is σ = 39839040. Its totient is φ = 6612320.

The previous prime is 19878197. The next prime is 19878247. The reversal of 19878234 is 43287891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 6305.

It is an arithmetic number, because the mean of its divisors is an integer number (2489940).

Almost surely, 2^19878234 is an apocalyptic number.

19878234 is an abundant number, since it is smaller than the sum of its proper divisors (19960806).

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

19878234 is a wasteful number, since it uses less digits than its factorization.

19878234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885.

The product of its digits is 96768, while the sum is 42.

The square root of 19878234 is about 4458.5013177076. The cubic root of 19878234 is about 270.8897669436.

The spelling of 19878234 in words is "nineteen million, eight hundred seventy-eight thousand, two hundred thirty-four".