1921488 has 20 divisors (see below), whose sum is σ = 4963968. Its totient is φ = 640480.

The previous prime is 1921483. The next prime is 1921499. The reversal of 1921488 is 8841291.

It is a super-2 number, since 2×1921488² = 7384232268288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19968 + ... + 20063.

2^1921488 is an apocalyptic number.

It is an amenable number.

1921488 is an abundant number, since it is smaller than the sum of its proper divisors (3042480).

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

1921488 is a wasteful number, since it uses less digits than its factorization.

1921488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40042 (or 40036 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 1921488 is about 1386.1774778144. The cubic root of 1921488 is about 124.3214000164.

The spelling of 1921488 in words is "one million, nine hundred twenty-one thousand, four hundred eighty-eight".