6401960 has 16 divisors (see below), whose sum is σ = 14404500. Its totient is φ = 2560768.

The previous prime is 6401959. The next prime is 6401963. The reversal of 6401960 is 691046.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 574564 = 2414^2 + 758^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79985 + ... + 80064.

Almost surely, 2^6401960 is an apocalyptic number.

It is an amenable number.

6401960 is an abundant number, since it is smaller than the sum of its proper divisors (8002540).

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

6401960 is a wasteful number, since it uses less digits than its factorization.

6401960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160060 (or 160056 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 6401960 is about 2530.2094774939. The cubic root of 6401960 is about 185.6825045644.

It can be divided in two parts, 640 and 1960, that multiplied together give a square (1254400 = 1120²).

The spelling of 6401960 in words is "six million, four hundred one thousand, nine hundred sixty".