6401860 has 48 divisors (see below), whose sum is σ = 14999040. Its totient is φ = 2280960.

The previous prime is 6401849. The next prime is 6401867. The reversal of 6401860 is 681046.

It is a super-2 number, since 2×6401860² = 81967622919200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6401867) 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 15 ways as a sum of consecutive naturals, for example, 5965 + ... + 6955.

It is an arithmetic number, because the mean of its divisors is an integer number (312480).

Almost surely, 2^6401860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6401860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7499520).

6401860 is an abundant number, since it is smaller than the sum of its proper divisors (8597180).

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

6401860 is a wasteful number, since it uses less digits than its factorization.

6401860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 6401860 is about 2530.1897162071. The cubic root of 6401860 is about 185.6815377591.

It can be divided in two parts, 640 and 1860, that added together give a square (2500 = 50²).

The spelling of 6401860 in words is "six million, four hundred one thousand, eight hundred sixty".