40021432 has 32 divisors (see below), whose sum is σ = 82180080. Its totient is φ = 18120960.

The previous prime is 40021427. The next prime is 40021459. The reversal of 40021432 is 23412004.

40021432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26818 + ... + 28270.

Almost surely, 2^40021432 is an apocalyptic number.

It is an amenable number.

40021432 is an abundant number, since it is smaller than the sum of its proper divisors (42158648).

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

40021432 is a wasteful number, since it uses less digits than its factorization.

40021432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40021432 is about 6326.2494418099. The cubic root of 40021432 is about 342.0562587705.

Adding to 40021432 its reverse (23412004), we get a palindrome (63433436).

The spelling of 40021432 in words is "forty million, twenty-one thousand, four hundred thirty-two".