2021190440 has 32 divisors (see below), whose sum is σ = 4549041000. Its totient is φ = 808233984.

The previous prime is 2021190439. The next prime is 2021190443. The reversal of 2021190440 is 440911202.

It can be written as a sum of positive squares in 4 ways, for example, as 1770221476 + 250968964 = 42074^2 + 15842^2 .

It is not an unprimeable number, because it can be changed into a prime (2021190443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193676 + ... + 203844.

Almost surely, 2^2021190440 is an apocalyptic number.

2021190440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021190440 is an abundant number, since it is smaller than the sum of its proper divisors (2527850560).

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

2021190440 is a wasteful number, since it uses less digits than its factorization.

2021190440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15149 (or 15145 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2021190440 is about 44957.6516290609. The cubic root of 2021190440 is about 1264.3551400874.

The spelling of 2021190440 in words is "two billion, twenty-one million, one hundred ninety thousand, four hundred forty".