19000990 has 16 divisors (see below), whose sum is σ = 35689248. Its totient is φ = 7269856.

The previous prime is 19000987. The next prime is 19000991. The reversal of 19000990 is 9900091.

It is a super-2 number, since 2×19000990² = 722075241960200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19000991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41077 + ... + 41536.

It is an arithmetic number, because the mean of its divisors is an integer number (2230578).

Almost surely, 2^19000990 is an apocalyptic number.

19000990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19000990 is a deficient number, since it is larger than the sum of its proper divisors (16688258).

19000990 is a wasteful number, since it uses less digits than its factorization.

19000990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82643.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 19000990 is about 4359.0125028497. The cubic root of 19000990 is about 266.8447993840.

The spelling of 19000990 in words is "nineteen million, nine hundred ninety", and thus it is an aban number.