2781232 has 10 divisors (see below), whose sum is σ = 5388668. Its totient is φ = 1390608.

The previous prime is 2781221. The next prime is 2781271. The reversal of 2781232 is 2321872.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2781197 and 2781206.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86898 + ... + 86929.

2^2781232 is an apocalyptic number.

It is an amenable number.

2781232 is a deficient number, since it is larger than the sum of its proper divisors (2607436).

2781232 is a wasteful number, since it uses less digits than its factorization.

2781232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173835 (or 173829 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 2781232 is about 1667.7026113789. The cubic root of 2781232 is about 140.6303548249.

The spelling of 2781232 in words is "two million, seven hundred eighty-one thousand, two hundred thirty-two".