1891488 has 96 divisors (see below), whose sum is σ = 5624640. Its totient is φ = 552960.

The previous prime is 1891457. The next prime is 1891489. The reversal of 1891488 is 8841981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1891489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30978 + ... + 31038.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2^1891488 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 1891488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2812320).

1891488 is an abundant number, since it is smaller than the sum of its proper divisors (3733152).

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

1891488 is a wasteful number, since it uses less digits than its factorization.

1891488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 102 counting only the distinct ones).

The product of its digits is 18432, while the sum is 39.

The square root of 1891488 is about 1375.3137823784. The cubic root of 1891488 is about 123.6709974274.

The spelling of 1891488 in words is "one million, eight hundred ninety-one thousand, four hundred eighty-eight".