6555438 has 64 divisors (see below), whose sum is σ = 15923520. Its totient is φ = 1990656.

The previous prime is 6555433. The next prime is 6555443. The reversal of 6555438 is 8345556.

It is an interprime number because it is at equal distance from previous prime (6555433) and next prime (6555443).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33870 + ... + 34062.

It is an arithmetic number, because the mean of its divisors is an integer number (248805).

Almost surely, 2^6555438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6555438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7961760).

6555438 is an abundant number, since it is smaller than the sum of its proper divisors (9368082).

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

6555438 is a wasteful number, since it uses less digits than its factorization.

6555438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 252 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 6555438 is about 2560.3589592086. The cubic root of 6555438 is about 187.1546282217.

The spelling of 6555438 in words is "six million, five hundred fifty-five thousand, four hundred thirty-eight".