6429540 has 48 divisors (see below), whose sum is σ = 19389888. Its totient is φ = 1582464.

The previous prime is 6429539. The next prime is 6429541. The reversal of 6429540 is 459246.

It is an interprime number because it is at equal distance from previous prime (6429539) and next prime (6429541).

It is a super-2 number, since 2×6429540² = 82677969223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6429498 and 6429507.

It is not an unprimeable number, because it can be changed into a prime (6429541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3342 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (403956).

Almost surely, 2^6429540 is an apocalyptic number.

6429540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6429540 is an abundant number, since it is smaller than the sum of its proper divisors (12960348).

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

6429540 is a wasteful number, since it uses less digits than its factorization.

6429540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8268 (or 8266 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 6429540 is about 2535.6537618531. The cubic root of 6429540 is about 185.9487660947.

The spelling of 6429540 in words is "six million, four hundred twenty-nine thousand, five hundred forty".