32443440 has 40 divisors (see below), whose sum is σ = 100575408. Its totient is φ = 8651520.

The previous prime is 32443427. The next prime is 32443441. The reversal of 32443440 is 4434423.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 32443440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32443441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67351 + ... + 67830.

Almost surely, 2^32443440 is an apocalyptic number.

32443440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32443440 is an abundant number, since it is smaller than the sum of its proper divisors (68131968).

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

32443440 is a wasteful number, since it uses less digits than its factorization.

32443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135197 (or 135191 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 32443440 is about 5695.9143251984. The cubic root of 32443440 is about 318.9399820919.

Adding to 32443440 its reverse (4434423), we get a palindrome (36877863).

The spelling of 32443440 in words is "thirty-two million, four hundred forty-three thousand, four hundred forty".