6538990 has 8 divisors (see below), whose sum is σ = 11770200. Its totient is φ = 2615592.

The previous prime is 6538979. The next prime is 6538991. The reversal of 6538990 is 998356.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6538991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326940 + ... + 326959.

It is an arithmetic number, because the mean of its divisors is an integer number (1471275).

Almost surely, 2^6538990 is an apocalyptic number.

6538990 is a deficient number, since it is larger than the sum of its proper divisors (5231210).

6538990 is a wasteful number, since it uses less digits than its factorization.

6538990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653906.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 6538990 is about 2557.1448922578. The cubic root of 6538990 is about 186.9979696082.

The spelling of 6538990 in words is "six million, five hundred thirty-eight thousand, nine hundred ninety".