2190540 has 48 divisors (see below), whose sum is σ = 6693120. Its totient is φ = 530880.

The previous prime is 2190533. The next prime is 2190541. The reversal of 2190540 is 450912.

It is not an unprimeable number, because it can be changed into a prime (2190541) 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, 1000 + ... + 2319.

It is an arithmetic number, because the mean of its divisors is an integer number (139440).

2^2190540 is an apocalyptic number.

2190540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2190540 is an abundant number, since it is smaller than the sum of its proper divisors (4502580).

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

2190540 is a wasteful number, since it uses less digits than its factorization.

2190540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2190540 is about 1480.0472965416. The cubic root of 2190540 is about 129.8724587383.

It can be divided in two parts, 21905 and 40, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 2190540 in words is "two million, one hundred ninety thousand, five hundred forty".