6401328 has 40 divisors (see below), whose sum is σ = 17409600. Its totient is φ = 2021184.

The previous prime is 6401327. The next prime is 6401341. The reversal of 6401328 is 8231046.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6401298 and 6401307.

It is not an unprimeable number, because it can be changed into a prime (6401327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598 + ... + 4421.

It is an arithmetic number, because the mean of its divisors is an integer number (435240).

Almost surely, 2^6401328 is an apocalyptic number.

It is an amenable number.

6401328 is an abundant number, since it is smaller than the sum of its proper divisors (11008272).

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

6401328 is a wasteful number, since it uses less digits than its factorization.

6401328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049 (or 7043 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 6401328 is about 2530.0845835663. The cubic root of 6401328 is about 185.6763941855.

The spelling of 6401328 in words is "six million, four hundred one thousand, three hundred twenty-eight".