40232432420 has 24 divisors (see below), whose sum is σ = 85308385344. Its totient is φ = 15936729696.

The previous prime is 40232432413. The next prime is 40232432479. The reversal of 40232432420 is 2423423204.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 40232432420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9763094 + ... + 9767213.

It is an arithmetic number, because the mean of its divisors is an integer number (3554516056).

Almost surely, 2^40232432420 is an apocalyptic number.

It is an amenable number.

40232432420 is an abundant number, since it is smaller than the sum of its proper divisors (45075952924).

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

40232432420 is a wasteful number, since it uses less digits than its factorization.

40232432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19530419 (or 19530417 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Subtracting from 40232432420 its product of nonzero digits (9216), we obtain a palindrome (40232423204).

Adding to 40232432420 its reverse (2423423204), we get a palindrome (42655855624).

The spelling of 40232432420 in words is "forty billion, two hundred thirty-two million, four hundred thirty-two thousand, four hundred twenty".