2140784 has 20 divisors (see below), whose sum is σ = 4211784. Its totient is φ = 1053888.

The previous prime is 2140781. The next prime is 2140807. The reversal of 2140784 is 4870412.

It is a super-3 number, since 3×2140784³ = 29433357497320230912, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140781) 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, 74 + ... + 2070.

2^2140784 is an apocalyptic number.

It is an amenable number.

2140784 is a deficient number, since it is larger than the sum of its proper divisors (2071000).

2140784 is a wasteful number, since it uses less digits than its factorization.

2140784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072 (or 2066 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 2140784 is about 1463.1418249780. The cubic root of 2140784 is about 128.8816092246.

The spelling of 2140784 in words is "two million, one hundred forty thousand, seven hundred eighty-four".