2578716 has 72 divisors (see below), whose sum is σ = 7745920. Its totient is φ = 734832.

The previous prime is 2578657. The next prime is 2578717. The reversal of 2578716 is 6178752.

2578716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6615 + ... + 6993.

2^2578716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2578716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3872960).

2578716 is an abundant number, since it is smaller than the sum of its proper divisors (5167204).

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

2578716 is a wasteful number, since it uses less digits than its factorization.

2578716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 391 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 2578716 is about 1605.8380989377. The cubic root of 2578716 is about 137.1306406529.

Adding to 2578716 its sum of digits (36), we get a palindrome (2578752).

2578716 divided by its sum of digits (36) gives a triangular number (71631 = T₃₇₈).

The spelling of 2578716 in words is "two million, five hundred seventy-eight thousand, seven hundred sixteen".