6404860 has 48 divisors (see below), whose sum is σ = 16773120. Its totient is φ = 1995840.

The previous prime is 6404837. The next prime is 6404873. The reversal of 6404860 is 684046.

6404860 = T₄₅₀ + T₄₅₁ + ... + T₅₀₅.

It is a super-3 number, since 3×6404860³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent 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, 540 + ... + 3619.

It is an arithmetic number, because the mean of its divisors is an integer number (349440).

Almost surely, 2^6404860 is an apocalyptic number.

It is an amenable number.

6404860 is an abundant number, since it is smaller than the sum of its proper divisors (10368260).

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

6404860 is a wasteful number, since it uses less digits than its factorization.

6404860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6404860 is about 2530.7824876903. The cubic root of 6404860 is about 185.7105375406.

The spelling of 6404860 in words is "six million, four hundred four thousand, eight hundred sixty".