19400090 has 16 divisors (see below), whose sum is σ = 34974720. Its totient is φ = 7747920.

The previous prime is 19400089. The next prime is 19400113. The reversal of 19400090 is 9000491.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8135 + ... + 10245.

It is an arithmetic number, because the mean of its divisors is an integer number (2185920).

Almost surely, 2^19400090 is an apocalyptic number.

19400090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19400090 is a deficient number, since it is larger than the sum of its proper divisors (15574630).

19400090 is a wasteful number, since it uses less digits than its factorization.

19400090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 19400090 is about 4404.5533258209. The cubic root of 19400090 is about 268.7001537263.

The spelling of 19400090 in words is "nineteen million, four hundred thousand, ninety".