6401924 has 24 divisors (see below), whose sum is σ = 11688600. Its totient is φ = 3064320.

The previous prime is 6401921. The next prime is 6401929. The reversal of 6401924 is 4291046.

It can be written as a sum of positive squares in 4 ways, for example, as 3276100 + 3125824 = 1810^2 + 1768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6401893 and 6401902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401921) 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, 26444 + ... + 26684.

It is an arithmetic number, because the mean of its divisors is an integer number (487025).

Almost surely, 2^6401924 is an apocalyptic number.

It is an amenable number.

6401924 is a deficient number, since it is larger than the sum of its proper divisors (5286676).

6401924 is a wasteful number, since it uses less digits than its factorization.

6401924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 6401924 is about 2530.2023634484. The cubic root of 6401924 is about 185.6821565157.

The spelling of 6401924 in words is "six million, four hundred one thousand, nine hundred twenty-four".