40120432 has 80 divisors (see below), whose sum is σ = 89396064. Its totient is φ = 17280000.

The previous prime is 40120397. The next prime is 40120463. The reversal of 40120432 is 23402104.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397182 + ... + 397282.

Almost surely, 2^40120432 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 40120432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44698032).

40120432 is an abundant number, since it is smaller than the sum of its proper divisors (49275632).

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

40120432 is a wasteful number, since it uses less digits than its factorization.

40120432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 212 counting only the distinct ones).

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

The square root of 40120432 is about 6334.0691502383. The cubic root of 40120432 is about 342.3380718204.

Adding to 40120432 its reverse (23402104), we get a palindrome (63522536).

The spelling of 40120432 in words is "forty million, one hundred twenty thousand, four hundred thirty-two".