2782458 has 64 divisors (see below), whose sum is σ = 7499520. Its totient is φ = 746496.

The previous prime is 2782421. The next prime is 2782469. The reversal of 2782458 is 8542872.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6210 + ... + 6642.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^2782458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2782458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3749760).

2782458 is an abundant number, since it is smaller than the sum of its proper divisors (4717062).

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

2782458 is a wasteful number, since it uses less digits than its factorization.

2782458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 462 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 2782458 is about 1668.0701424101. The cubic root of 2782458 is about 140.6510156313.

It can be divided in two parts, 2782 and 458, that added together give a triangular number (3240 = T₈₀).

The spelling of 2782458 in words is "two million, seven hundred eighty-two thousand, four hundred fifty-eight".