6381690 has 32 divisors (see below), whose sum is σ = 17504640. Its totient is φ = 1458624.

The previous prime is 6381689. The next prime is 6381703. The reversal of 6381690 is 961836.

It is a super-2 number, since 2×6381690² = 81451934512200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14985 + ... + 15404.

It is an arithmetic number, because the mean of its divisors is an integer number (547020).

Almost surely, 2^6381690 is an apocalyptic number.

6381690 is an abundant number, since it is smaller than the sum of its proper divisors (11122950).

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

6381690 is a wasteful number, since it uses less digits than its factorization.

6381690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30406.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 6381690 is about 2526.2007046155. The cubic root of 6381690 is about 185.4863269516.

The spelling of 6381690 in words is "six million, three hundred eighty-one thousand, six hundred ninety".