3540432 has 80 divisors (see below), whose sum is σ = 10749312. Its totient is φ = 983040.

The previous prime is 3540421. The next prime is 3540443. The reversal of 3540432 is 2340453.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3540421) and next prime (3540443).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 3540399 and 3540408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13648 + ... + 13904.

Almost surely, 2^3540432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3540432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5374656).

3540432 is an abundant number, since it is smaller than the sum of its proper divisors (7208880).

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

3540432 is a wasteful number, since it uses less digits than its factorization.

3540432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 3540432 is about 1881.6035714252. The cubic root of 3540432 is about 152.4118562569.

Adding to 3540432 its sum of digits (21), we get a palindrome (3540453).

Adding to 3540432 its reverse (2340453), we get a palindrome (5880885).

The spelling of 3540432 in words is "three million, five hundred forty thousand, four hundred thirty-two".