19488890 has 32 divisors (see below), whose sum is σ = 36533376. Its totient is φ = 7479360.

The previous prime is 19488869. The next prime is 19488901. The reversal of 19488890 is 9888491.

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 15 ways as a sum of consecutive naturals, for example, 25859 + ... + 26601.

It is an arithmetic number, because the mean of its divisors is an integer number (1141668).

Almost surely, 2^19488890 is an apocalyptic number.

19488890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19488890 is a deficient number, since it is larger than the sum of its proper divisors (17044486).

19488890 is a wasteful number, since it uses less digits than its factorization.

19488890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 19488890 is about 4414.6222941493. The cubic root of 19488890 is about 269.1095033787.

The spelling of 19488890 in words is "nineteen million, four hundred eighty-eight thousand, eight hundred ninety".