2578916 has 6 divisors (see below), whose sum is σ = 4513110. Its totient is φ = 1289456.

The previous prime is 2578907. The next prime is 2578931. The reversal of 2578916 is 6198752.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 729316 = 1360^2 + 854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2578916.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322361 + ... + 322368.

It is an arithmetic number, because the mean of its divisors is an integer number (752185).

2^2578916 is an apocalyptic number.

It is an amenable number.

2578916 is a deficient number, since it is larger than the sum of its proper divisors (1934194).

2578916 is a wasteful number, since it uses less digits than its factorization.

2578916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644733 (or 644731 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 2578916 is about 1605.9003705087. The cubic root of 2578916 is about 137.1341857530.

The spelling of 2578916 in words is "two million, five hundred seventy-eight thousand, nine hundred sixteen".