32438440 has 16 divisors (see below), whose sum is σ = 72986580. Its totient is φ = 12975360.

The previous prime is 32438437. The next prime is 32438447. The reversal of 32438440 is 4483423.

It can be written as a sum of positive squares in 2 ways, for example, as 29833444 + 2604996 = 5462^2 + 1614^2 .

It is a junction number, because it is equal to n+sod(n) for n = 32438399 and 32438408.

It is not an unprimeable number, because it can be changed into a prime (32438447) 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, 405441 + ... + 405520.

Almost surely, 2^32438440 is an apocalyptic number.

It is an amenable number.

32438440 is an abundant number, since it is smaller than the sum of its proper divisors (40548140).

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

32438440 is a wasteful number, since it uses less digits than its factorization.

32438440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810972 (or 810968 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 32438440 is about 5695.4753971903. The cubic root of 32438440 is about 318.9235968397.

The spelling of 32438440 in words is "thirty-two million, four hundred thirty-eight thousand, four hundred forty".