27823640 has 32 divisors (see below), whose sum is σ = 67420080. Its totient is φ = 10273152.

The previous prime is 27823637. The next prime is 27823643. The reversal of 27823640 is 4632872.

It is an interprime number because it is at equal distance from previous prime (27823637) and next prime (27823643).

It is a junction number, because it is equal to n+sod(n) for n = 27823597 and 27823606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27823643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26234 + ... + 27273.

Almost surely, 2^27823640 is an apocalyptic number.

27823640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27823640 is an abundant number, since it is smaller than the sum of its proper divisors (39596440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27823640 is a wasteful number, since it uses less digits than its factorization.

27823640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53531 (or 53527 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 27823640 is about 5274.8118449856. The cubic root of 27823640 is about 303.0200148709.

The spelling of 27823640 in words is "twenty-seven million, eight hundred twenty-three thousand, six hundred forty".