1888216 has 32 divisors (see below), whose sum is σ = 3960000. Its totient is φ = 836640.

The previous prime is 1888213. The next prime is 1888217. The reversal of 1888216 is 6128881.

1888216 = 336² + 337² + ... + 351².

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1888213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3535 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (123750).

2^1888216 is an apocalyptic number.

1888216 is the 735-th centered heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1888216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980000).

1888216 is an abundant number, since it is smaller than the sum of its proper divisors (2071784).

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

1888216 is a wasteful number, since it uses less digits than its factorization.

1888216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 555 counting only the distinct ones).

The product of its digits is 6144, while the sum is 34.

The square root of 1888216 is about 1374.1237207763. The cubic root of 1888216 is about 123.5996453036.

The spelling of 1888216 in words is "one million, eight hundred eighty-eight thousand, two hundred sixteen".