6638145 has 32 divisors (see below), whose sum is σ = 11280384. Its totient is φ = 3326400.

The previous prime is 6638141. The next prime is 6638147. The reversal of 6638145 is 5418366.

It is not a de Polignac number, because 6638145 - 2² = 6638141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6638141) 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, 24360 + ... + 24630.

It is an arithmetic number, because the mean of its divisors is an integer number (352512).

Almost surely, 2^6638145 is an apocalyptic number.

It is an amenable number.

6638145 is a deficient number, since it is larger than the sum of its proper divisors (4642239).

6638145 is a wasteful number, since it uses less digits than its factorization.

6638145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its digits is 17280, while the sum is 33.

The square root of 6638145 is about 2576.4597803963. The cubic root of 6638145 is about 187.9384229449.

The spelling of 6638145 in words is "six million, six hundred thirty-eight thousand, one hundred forty-five".