19272816 has 60 divisors (see below), whose sum is σ = 55946072. Its totient is φ = 6422976.

The previous prime is 19272811. The next prime is 19272823. The reversal of 19272816 is 61827291.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19272811) 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, 1410 + ... + 6366.

Almost surely, 2^19272816 is an apocalyptic number.

19272816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19272816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27973036).

19272816 is an abundant number, since it is smaller than the sum of its proper divisors (36673256).

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

19272816 is an equidigital number, since it uses as much as digits as its factorization.

19272816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980 (or 4962 counting only the distinct ones).

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

The square root of 19272816 is about 4390.0815482175. The cubic root of 19272816 is about 268.1112629277. Note that the first 3 decimals are identical.

The spelling of 19272816 in words is "nineteen million, two hundred seventy-two thousand, eight hundred sixteen".