32403140 has 96 divisors (see below), whose sum is σ = 86655744. Its totient is φ = 9884160.

The previous prime is 32403127. The next prime is 32403149. The reversal of 32403140 is 4130423.

It is not an unprimeable number, because it can be changed into a prime (32403149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81422 + ... + 81818.

It is an arithmetic number, because the mean of its divisors is an integer number (902664).

Almost surely, 2^32403140 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 32403140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43327872).

32403140 is an abundant number, since it is smaller than the sum of its proper divisors (54252604).

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

32403140 is a wasteful number, since it uses less digits than its factorization.

32403140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 32403140 is about 5692.3756025055. The cubic root of 32403140 is about 318.8078690268.

Adding to 32403140 its reverse (4130423), we get a palindrome (36533563).

The spelling of 32403140 in words is "thirty-two million, four hundred three thousand, one hundred forty".