32042440 has 16 divisors (see below), whose sum is σ = 72095580. Its totient is φ = 12816960.

The previous prime is 32042431. The next prime is 32042441. The reversal of 32042440 is 4424023.

It can be written as a sum of positive squares in 2 ways, for example, as 28965924 + 3076516 = 5382^2 + 1754^2 .

It is a super-2 number, since 2×32042440² = 2053435922307200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (32042441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400491 + ... + 400570.

Almost surely, 2^32042440 is an apocalyptic number.

It is an amenable number.

32042440 is an abundant number, since it is smaller than the sum of its proper divisors (40053140).

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

32042440 is a wasteful number, since it uses less digits than its factorization.

32042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801072 (or 801068 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 32042440 is about 5660.6042080329. The cubic root of 32042440 is about 317.6205011014.

Adding to 32042440 its reverse (4424023), we get a palindrome (36466463).

The spelling of 32042440 in words is "thirty-two million, forty-two thousand, four hundred forty".