2140728 has 32 divisors (see below), whose sum is σ = 5391360. Its totient is φ = 708320.

The previous prime is 2140681. The next prime is 2140729. The reversal of 2140728 is 8270412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 2140698 and 2140707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140729) 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, 4351 + ... + 4817.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

2^2140728 is an apocalyptic number.

It is an amenable number.

2140728 is an abundant number, since it is smaller than the sum of its proper divisors (3250632).

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

2140728 is a wasteful number, since it uses less digits than its factorization.

2140728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2140728 is about 1463.1226879520. The cubic root of 2140728 is about 128.8804854256.

The spelling of 2140728 in words is "two million, one hundred forty thousand, seven hundred twenty-eight".