6625398 has 48 divisors (see below), whose sum is σ = 14925456. Its totient is φ = 1948800.

The previous prime is 6625387. The next prime is 6625417. The reversal of 6625398 is 8935266.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65548 + ... + 65648.

It is an arithmetic number, because the mean of its divisors is an integer number (310947).

Almost surely, 2^6625398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6625398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7462728).

6625398 is an abundant number, since it is smaller than the sum of its proper divisors (8300058).

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

6625398 is a wasteful number, since it uses less digits than its factorization.

6625398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 148 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 6625398 is about 2573.9848484403. The cubic root of 6625398 is about 187.8180486464.

The spelling of 6625398 in words is "six million, six hundred twenty-five thousand, three hundred ninety-eight".