6432240 has 40 divisors (see below), whose sum is σ = 19940688. Its totient is φ = 1715200.

The previous prime is 6432227. The next prime is 6432263. The reversal of 6432240 is 422346.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×6432240² = 82747422835200, which contains 22 as substring.

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, 13161 + ... + 13640.

Almost surely, 2^6432240 is an apocalyptic number.

6432240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6432240 is an abundant number, since it is smaller than the sum of its proper divisors (13508448).

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

6432240 is a wasteful number, since it uses less digits than its factorization.

6432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26817 (or 26811 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 6432240 is about 2536.1861130445. The cubic root of 6432240 is about 185.9747913576.

Adding to 6432240 its reverse (422346), we get a palindrome (6854586).

The spelling of 6432240 in words is "six million, four hundred thirty-two thousand, two hundred forty".