6404148 has 18 divisors (see below), whose sum is σ = 16188354. Its totient is φ = 2134704.

The previous prime is 6404141. The next prime is 6404161. The reversal of 6404148 is 8414046.

6404148 is a `hidden beast` number, since 640 + 4 + 14 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4613904 + 1790244 = 2148^2 + 1338^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×6404148² = 82026223211808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88911 + ... + 88982.

It is an arithmetic number, because the mean of its divisors is an integer number (899353).

Almost surely, 2^6404148 is an apocalyptic number.

It is an amenable number.

6404148 is an abundant number, since it is smaller than the sum of its proper divisors (9784206).

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

6404148 is a wasteful number, since it uses less digits than its factorization.

6404148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177903 (or 177898 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 6404148 is about 2530.6418158246. The cubic root of 6404148 is about 185.7036557455.

The spelling of 6404148 in words is "six million, four hundred four thousand, one hundred forty-eight".