19287216 has 60 divisors (see below), whose sum is σ = 58135168. Its totient is φ = 5933952.

The previous prime is 19287211. The next prime is 19287217. The reversal of 19287216 is 61278291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19287211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3280 + ... + 7023.

Almost surely, 2^19287216 is an apocalyptic number.

19287216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19287216 is an abundant number, since it is smaller than the sum of its proper divisors (38847952).

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

19287216 is a wasteful number, since it uses less digits than its factorization.

19287216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330 (or 10321 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 19287216 is about 4391.7213026329. The cubic root of 19287216 is about 268.1780208772.

It can be divided in two parts, 19287 and 216, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 19287216 in words is "nineteen million, two hundred eighty-seven thousand, two hundred sixteen".