19381290 has 32 divisors (see below), whose sum is σ = 46949760. Its totient is φ = 5120064.

The previous prime is 19381289. The next prime is 19381301. The reversal of 19381290 is 9218391.

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 15 ways as a sum of consecutive naturals, for example, 307 + ... + 6233.

It is an arithmetic number, because the mean of its divisors is an integer number (1467180).

Almost surely, 2^19381290 is an apocalyptic number.

19381290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19381290 is an abundant number, since it is smaller than the sum of its proper divisors (27568470).

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

19381290 is a wasteful number, since it uses less digits than its factorization.

19381290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6046.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 19381290 is about 4402.4186534222. The cubic root of 19381290 is about 268.6133294635.

The spelling of 19381290 in words is "nineteen million, three hundred eighty-one thousand, two hundred ninety".