6628380 has 96 divisors (see below), whose sum is σ = 20659968. Its totient is φ = 1587520.

The previous prime is 6628379. The next prime is 6628403. The reversal of 6628380 is 838266.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79819 + ... + 79901.

It is an arithmetic number, because the mean of its divisors is an integer number (215208).

Almost surely, 2^6628380 is an apocalyptic number.

6628380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6628380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10329984).

6628380 is an abundant number, since it is smaller than the sum of its proper divisors (14031588).

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

6628380 is a wasteful number, since it uses less digits than its factorization.

6628380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 6628380 is about 2574.5640407650. The cubic root of 6628380 is about 187.8462225219.

It can be divided in two parts, 66 and 28380, that multiplied together give a triangular number (1873080 = T₁₉₃₅).

The spelling of 6628380 in words is "six million, six hundred twenty-eight thousand, three hundred eighty".