6429140 has 24 divisors (see below), whose sum is σ = 13549032. Its totient is φ = 2562560.

The previous prime is 6429139. The next prime is 6429149. The reversal of 6429140 is 419246.

It can be written as a sum of positive squares in 4 ways, for example, as 58564 + 6370576 = 242^2 + 2524^2 .

It is a super-2 number, since 2×6429140² = 82667682279200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10112 + ... + 10728.

It is an arithmetic number, because the mean of its divisors is an integer number (564543).

Almost surely, 2^6429140 is an apocalyptic number.

It is an amenable number.

6429140 is an abundant number, since it is smaller than the sum of its proper divisors (7119892).

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

6429140 is a wasteful number, since it uses less digits than its factorization.

6429140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

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

The square root of 6429140 is about 2535.5748855043. The cubic root of 6429140 is about 185.9449098805.

The spelling of 6429140 in words is "six million, four hundred twenty-nine thousand, one hundred forty".