6429440 has 36 divisors (see below), whose sum is σ = 15403584. Its totient is φ = 2571264.

The previous prime is 6429439. The next prime is 6429457. The reversal of 6429440 is 449246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232 + ... + 3791.

Almost surely, 2^6429440 is an apocalyptic number.

It is an amenable number.

6429440 is an abundant number, since it is smaller than the sum of its proper divisors (8974144).

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

6429440 is an equidigital number, since it uses as much as digits as its factorization.

6429440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044 (or 5030 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 6429440 is about 2535.6340429960. The cubic root of 6429440 is about 185.9478020561.

The spelling of 6429440 in words is "six million, four hundred twenty-nine thousand, four hundred forty".