6429040 has 20 divisors (see below), whose sum is σ = 14947704. Its totient is φ = 2571584.

The previous prime is 6429019. The next prime is 6429047. The reversal of 6429040 is 409246.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 6428996 and 6429014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429047) 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, 40102 + ... + 40261.

Almost surely, 2^6429040 is an apocalyptic number.

It is an amenable number.

6429040 is an abundant number, since it is smaller than the sum of its proper divisors (8518664).

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

6429040 is a wasteful number, since it uses less digits than its factorization.

6429040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80376 (or 80370 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 6429040 is about 2535.5551660337. Note that the first 3 decimals coincide. The cubic root of 6429040 is about 185.9439458020.

The spelling of 6429040 in words is "six million, four hundred twenty-nine thousand, forty".