40405232 has 40 divisors (see below), whose sum is σ = 89803776. Its totient is φ = 17251776.

The previous prime is 40405231. The next prime is 40405237. The reversal of 40405232 is 23250404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40405231) 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, 40613 + ... + 41595.

Almost surely, 2^40405232 is an apocalyptic number.

It is an amenable number.

40405232 is an abundant number, since it is smaller than the sum of its proper divisors (49398544).

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

40405232 is a wasteful number, since it uses less digits than its factorization.

40405232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40405232 is about 6356.5109926751. The cubic root of 40405232 is about 343.1462060897.

Adding to 40405232 its reverse (23250404), we get a palindrome (63655636).

The spelling of 40405232 in words is "forty million, four hundred five thousand, two hundred thirty-two".