5651638 has 4 divisors (see below), whose sum is σ = 8477460. Its totient is φ = 2825818.

The previous prime is 5651623. The next prime is 5651707. The reversal of 5651638 is 8361565.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1412908 + ... + 1412911.

It is an arithmetic number, because the mean of its divisors is an integer number (2119365).

Almost surely, 2^5651638 is an apocalyptic number.

5651638 is a deficient number, since it is larger than the sum of its proper divisors (2825822).

5651638 is a wasteful number, since it uses less digits than its factorization.

5651638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825821.

The product of its digits is 21600, while the sum is 34.

The square root of 5651638 is about 2377.3173957215. The cubic root of 5651638 is about 178.1249595978.

The spelling of 5651638 in words is "five million, six hundred fifty-one thousand, six hundred thirty-eight".