40207232 has 64 divisors (see below), whose sum is σ = 87707760. Its totient is φ = 18247680.

The previous prime is 40207201. The next prime is 40207267. The reversal of 40207232 is 23270204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 121307 + ... + 121637.

Almost surely, 2^40207232 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 40207232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43853880).

40207232 is an abundant number, since it is smaller than the sum of its proper divisors (47500528).

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

40207232 is a wasteful number, since it uses less digits than its factorization.

40207232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 40207232 is about 6340.9172838005. The cubic root of 40207232 is about 342.5847752213.

Adding to 40207232 its reverse (23270204), we get a palindrome (63477436).

The spelling of 40207232 in words is "forty million, two hundred seven thousand, two hundred thirty-two".