19042890 has 32 divisors (see below), whose sum is σ = 48392640. Its totient is φ = 4779264.

The previous prime is 19042889. The next prime is 19042909. The reversal of 19042890 is 9824091.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18160 + ... + 19179.

It is an arithmetic number, because the mean of its divisors is an integer number (1512270).

Almost surely, 2^19042890 is an apocalyptic number.

19042890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19042890 is an abundant number, since it is smaller than the sum of its proper divisors (29349750).

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

19042890 is a wasteful number, since it uses less digits than its factorization.

19042890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37366.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 19042890 is about 4363.8159906211. The cubic root of 19042890 is about 267.0407994996.

The spelling of 19042890 in words is "nineteen million, forty-two thousand, eight hundred ninety".