2578923 has 6 divisors (see below), whose sum is σ = 3725124. Its totient is φ = 1719276.

The previous prime is 2578907. The next prime is 2578931. The reversal of 2578923 is 3298752.

It is a happy number.

It is not a de Polignac number, because 2578923 - 2⁴ = 2578907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143265 + ... + 143282.

It is an arithmetic number, because the mean of its divisors is an integer number (620854).

2^2578923 is an apocalyptic number.

2578923 is a deficient number, since it is larger than the sum of its proper divisors (1146201).

2578923 is a wasteful number, since it uses less digits than its factorization.

2578923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286553 (or 286550 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2578923 is about 1605.9025499700. The cubic root of 2578923 is about 137.1343098282.

It can be divided in two parts, 257 and 8923, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 2578923 in words is "two million, five hundred seventy-eight thousand, nine hundred twenty-three".