1891472 has 30 divisors (see below), whose sum is σ = 4032294. Its totient is φ = 858880.

The previous prime is 1891457. The next prime is 1891489. The reversal of 1891472 is 2741981.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 30976 = 1364^2 + 176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1448 + ... + 2424.

2^1891472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1891472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2016147).

1891472 is an abundant number, since it is smaller than the sum of its proper divisors (2140822).

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

1891472 is a wasteful number, since it uses less digits than its factorization.

1891472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 990 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 1891472 is about 1375.3079655117. The cubic root of 1891472 is about 123.6706487175.

It can be divided in two parts, 189 and 1472, that added together give a palindrome (1661).

The spelling of 1891472 in words is "one million, eight hundred ninety-one thousand, four hundred seventy-two".