40438732 has 6 divisors (see below), whose sum is σ = 70767788. Its totient is φ = 20219364.

The previous prime is 40438709. The next prime is 40438813. The reversal of 40438732 is 23783404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40438694 and 40438703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5054838 + ... + 5054845.

Almost surely, 2^40438732 is an apocalyptic number.

It is an amenable number.

40438732 is a deficient number, since it is larger than the sum of its proper divisors (30329056).

40438732 is a wasteful number, since it uses less digits than its factorization.

40438732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10109687 (or 10109685 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 40438732 is about 6359.1455400863. The cubic root of 40438732 is about 343.2410141286.

The spelling of 40438732 in words is "forty million, four hundred thirty-eight thousand, seven hundred thirty-two".