6428861 has 8 divisors (see below), whose sum is σ = 6639360. Its totient is φ = 6220368.

The previous prime is 6428857. The next prime is 6428879. The reversal of 6428861 is 1688246.

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 6428861 - 2² = 6428857 is a prime.

It is a super-3 number, since 3×6428861³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428761) 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, 8480 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (829920).

Almost surely, 2^6428861 is an apocalyptic number.

It is an amenable number.

6428861 is a deficient number, since it is larger than the sum of its proper divisors (210499).

6428861 is a wasteful number, since it uses less digits than its factorization.

6428861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003.

The product of its digits is 18432, while the sum is 35.

The square root of 6428861 is about 2535.5198677983. The cubic root of 6428861 is about 185.9422200765.

The spelling of 6428861 in words is "six million, four hundred twenty-eight thousand, eight hundred sixty-one".