2578628 has 24 divisors (see below), whose sum is σ = 5147352. Its totient is φ = 1119744.

The previous prime is 2578621. The next prime is 2578643. The reversal of 2578628 is 8268752.

It can be written as a sum of positive squares in 4 ways, for example, as 1119364 + 1459264 = 1058^2 + 1208^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2578591 and 2578600.

It is not an unprimeable number, because it can be changed into a prime (2578621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575 + ... + 2342.

It is an arithmetic number, because the mean of its divisors is an integer number (214473).

2^2578628 is an apocalyptic number.

It is an amenable number.

2578628 is a deficient number, since it is larger than the sum of its proper divisors (2568724).

2578628 is a wasteful number, since it uses less digits than its factorization.

2578628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951 (or 2949 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 2578628 is about 1605.8106986815. The cubic root of 2578628 is about 137.1290807508.

The spelling of 2578628 in words is "two million, five hundred seventy-eight thousand, six hundred twenty-eight".