32142440 has 96 divisors (see below), whose sum is σ = 82593000. Its totient is φ = 11235840.

The previous prime is 32142437. The next prime is 32142449. The reversal of 32142440 is 4424123.

It can be written as a sum of positive squares in 4 ways, for example, as 30980356 + 1162084 = 5566^2 + 1078^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (32142449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140246 + ... + 140474.

Almost surely, 2^32142440 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 32142440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41296500).

32142440 is an abundant number, since it is smaller than the sum of its proper divisors (50450560).

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

32142440 is a wasteful number, since it uses less digits than its factorization.

32142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 32142440 is about 5669.4303064770. The cubic root of 32142440 is about 317.9505744420.

Adding to 32142440 its reverse (4424123), we get a palindrome (36566563).

The spelling of 32142440 in words is "thirty-two million, one hundred forty-two thousand, four hundred forty".