40439432 has 32 divisors (see below), whose sum is σ = 83272320. Its totient is φ = 18258240.

The previous prime is 40439431. The next prime is 40439453. The reversal of 40439432 is 23493404.

It is a junction number, because it is equal to n+sod(n) for n = 40439395 and 40439404.

It is not an unprimeable number, because it can be changed into a prime (40439431) 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, 12353 + ... + 15279.

It is an arithmetic number, because the mean of its divisors is an integer number (2602260).

Almost surely, 2^40439432 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 40439432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41636160).

40439432 is an abundant number, since it is smaller than the sum of its proper divisors (42832888).

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

40439432 is a wasteful number, since it uses less digits than its factorization.

40439432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3101 (or 3097 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 40439432 is about 6359.2005786891. The cubic root of 40439432 is about 343.2429946335.

The spelling of 40439432 in words is "forty million, four hundred thirty-nine thousand, four hundred thirty-two".