2573638 has 4 divisors (see below), whose sum is σ = 3860460. Its totient is φ = 1286818.

The previous prime is 2573633. The next prime is 2573653. The reversal of 2573638 is 8363752.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2573638² = 13247225110088, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹² + 5⁸ + 7⁴ + 3¹² + 6⁶ + 3¹³ + 8⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2573633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643408 + ... + 643411.

It is an arithmetic number, because the mean of its divisors is an integer number (965115).

2^2573638 is an apocalyptic number.

2573638 is a deficient number, since it is larger than the sum of its proper divisors (1286822).

2573638 is a wasteful number, since it uses less digits than its factorization.

2573638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286821.

The product of its digits is 30240, while the sum is 34.

The square root of 2573638 is about 1604.2562139509. The cubic root of 2573638 is about 137.0405690853.

The spelling of 2573638 in words is "two million, five hundred seventy-three thousand, six hundred thirty-eight".