6406940 has 24 divisors (see below), whose sum is σ = 13502160. Its totient is φ = 2553728.

The previous prime is 6406937. The next prime is 6406951. The reversal of 6406940 is 496046.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10976 + ... + 11544.

It is an arithmetic number, because the mean of its divisors is an integer number (562590).

Almost surely, 2^6406940 is an apocalyptic number.

It is an amenable number.

6406940 is an abundant number, since it is smaller than the sum of its proper divisors (7095220).

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

6406940 is a wasteful number, since it uses less digits than its factorization.

6406940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6406940 is about 2531.1933944288. The cubic root of 6406940 is about 185.7306387403.

The spelling of 6406940 in words is "six million, four hundred six thousand, nine hundred forty".