19380312 has 48 divisors (see below), whose sum is σ = 59988240. Its totient is φ = 5537088.

The previous prime is 19380307. The next prime is 19380337. The reversal of 19380312 is 21308391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18723 + ... + 19730.

It is an arithmetic number, because the mean of its divisors is an integer number (1249755).

Almost surely, 2^19380312 is an apocalyptic number.

19380312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19380312 is an abundant number, since it is smaller than the sum of its proper divisors (40607928).

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

19380312 is a wasteful number, since it uses less digits than its factorization.

19380312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38472 (or 38465 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 19380312 is about 4402.3075767147. The cubic root of 19380312 is about 268.6088112184.

The spelling of 19380312 in words is "nineteen million, three hundred eighty thousand, three hundred twelve".