19380390 has 16 divisors (see below), whose sum is σ = 46513008. Its totient is φ = 5168096.

The previous prime is 19380367. The next prime is 19380407. The reversal of 19380390 is 9308391.

It is a congruent number.

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, 322977 + ... + 323036.

It is an arithmetic number, because the mean of its divisors is an integer number (2907063).

Almost surely, 2^19380390 is an apocalyptic number.

19380390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19380390 is an abundant number, since it is smaller than the sum of its proper divisors (27132618).

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

19380390 is a wasteful number, since it uses less digits than its factorization.

19380390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646023.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 19380390 is about 4402.3164356961. The cubic root of 19380390 is about 268.6091715749.

The spelling of 19380390 in words is "nineteen million, three hundred eighty thousand, three hundred ninety".