6388961 has 8 divisors (see below), whose sum is σ = 6657600. Its totient is φ = 6123600.

The previous prime is 6388951. The next prime is 6388973. The reversal of 6388961 is 1698836.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6388961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6388951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3650 + ... + 5108.

It is an arithmetic number, because the mean of its divisors is an integer number (832200).

Almost surely, 2^6388961 is an apocalyptic number.

It is an amenable number.

6388961 is a deficient number, since it is larger than the sum of its proper divisors (268639).

6388961 is a wasteful number, since it uses less digits than its factorization.

6388961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its digits is 62208, while the sum is 41.

The square root of 6388961 is about 2527.6394125745. The cubic root of 6388961 is about 185.5567450385.

The spelling of 6388961 in words is "six million, three hundred eighty-eight thousand, nine hundred sixty-one".