1899216 has 90 divisors (see below), whose sum is σ = 5895890. Its totient is φ = 570240.

The previous prime is 1899199. The next prime is 1899253. The reversal of 1899216 is 6129981.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 156816 = 1320^2 + 396^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17370 + ... + 17478.

2^1899216 is an apocalyptic number.

1899216 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 1899216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2947945).

1899216 is an abundant number, since it is smaller than the sum of its proper divisors (3996674).

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

1899216 is a wasteful number, since it uses less digits than its factorization.

1899216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 125 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 1899216 is about 1378.1204591762. The cubic root of 1899216 is about 123.8391949550.

The spelling of 1899216 in words is "one million, eight hundred ninety-nine thousand, two hundred sixteen".