6628431 has 8 divisors (see below), whose sum is σ = 8854704. Its totient is φ = 4410560.

The previous prime is 6628423. The next prime is 6628477. The reversal of 6628431 is 1348266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6628431 - 2³ = 6628423 is a prime.

It is a super-2 number, since 2×6628431² = 87872195043522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628411) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 61 + ... + 3641.

It is an arithmetic number, because the mean of its divisors is an integer number (1106838).

Almost surely, 2^6628431 is an apocalyptic number.

6628431 is a deficient number, since it is larger than the sum of its proper divisors (2226273).

6628431 is a wasteful number, since it uses less digits than its factorization.

6628431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201.

The product of its digits is 6912, while the sum is 30.

The square root of 6628431 is about 2574.5739453354. The cubic root of 6628431 is about 187.8467042953.

The spelling of 6628431 in words is "six million, six hundred twenty-eight thousand, four hundred thirty-one".