2578631 has 12 divisors (see below), whose sum is σ = 2875992. Its totient is φ = 2310000.

The previous prime is 2578621. The next prime is 2578643. The reversal of 2578631 is 1368752.

It is a happy number.

It is not a de Polignac number, because 2578631 - 2¹⁸ = 2316487 is a prime.

It is a super-2 number, since 2×2578631² = 13298675668322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 12116 + ... + 12326.

It is an arithmetic number, because the mean of its divisors is an integer number (239666).

2^2578631 is an apocalyptic number.

2578631 is a deficient number, since it is larger than the sum of its proper divisors (297361).

2578631 is a wasteful number, since it uses less digits than its factorization.

2578631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 323 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 2578631 is about 1605.8116327889. The cubic root of 2578631 is about 137.1291339298.

It can be divided in two parts, 257 and 8631, that added together give a palindrome (8888).

The spelling of 2578631 in words is "two million, five hundred seventy-eight thousand, six hundred thirty-one".