438540432 has 80 divisors (see below), whose sum is σ = 1308612672. Its totient is φ = 125071360.

The previous prime is 438540371. The next prime is 438540433. The reversal of 438540432 is 234045834.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 438540393 and 438540402.

It is not an unprimeable number, because it can be changed into a prime (438540433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15453 + ... + 33404.

Almost surely, 2^438540432 is an apocalyptic number.

It is an amenable number.

438540432 is an abundant number, since it is smaller than the sum of its proper divisors (870072240).

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

438540432 is a wasteful number, since it uses less digits than its factorization.

438540432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48896 (or 48890 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 438540432 is about 20941.3569760892. The cubic root of 438540432 is about 759.7485502414.

The spelling of 438540432 in words is "four hundred thirty-eight million, five hundred forty thousand, four hundred thirty-two".