4536638 has 4 divisors (see below), whose sum is σ = 6804960. Its totient is φ = 2268318.

The previous prime is 4536619. The next prime is 4536643. The reversal of 4536638 is 8366354.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8366354 = 2 ⋅4183177.

It is a junction number, because it is equal to n+sod(n) for n = 4536598 and 4536607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1134158 + ... + 1134161.

It is an arithmetic number, because the mean of its divisors is an integer number (1701240).

Almost surely, 2^4536638 is an apocalyptic number.

4536638 is the 1139-th centered heptagonal number.

4536638 is a deficient number, since it is larger than the sum of its proper divisors (2268322).

4536638 is a wasteful number, since it uses less digits than its factorization.

4536638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268321.

The product of its digits is 51840, while the sum is 35.

The square root of 4536638 is about 2129.9384967646. The cubic root of 4536638 is about 165.5432112138.

The spelling of 4536638 in words is "four million, five hundred thirty-six thousand, six hundred thirty-eight".