2782431 has 10 divisors (see below), whose sum is σ = 4156592. Its totient is φ = 1854900.

The previous prime is 2782421. The next prime is 2782469. The reversal of 2782431 is 1342872.

It is not a de Polignac number, because 2782431 - 2¹⁷ = 2651359 is a prime.

It is a super-2 number, since 2×2782431² = 15483844539522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2782395 and 2782404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782411) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17095 + ... + 17256.

2^2782431 is an apocalyptic number.

2782431 is a deficient number, since it is larger than the sum of its proper divisors (1374161).

2782431 is an equidigital number, since it uses as much as digits as its factorization.

2782431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34363 (or 34354 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2782431 is about 1668.0620492056. The cubic root of 2782431 is about 140.6505606870.

The spelling of 2782431 in words is "two million, seven hundred eighty-two thousand, four hundred thirty-one".