40320232 has 16 divisors (see below), whose sum is σ = 77644260. Its totient is φ = 19615104.

The previous prime is 40320229. The next prime is 40320233. The reversal of 40320232 is 23202304.

It can be written as a sum of positive squares in 2 ways, for example, as 32558436 + 7761796 = 5706^2 + 2786^2 .

It is a super-2 number, since 2×40320232² = 3251442217067648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40320233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67813 + ... + 68404.

Almost surely, 2^40320232 is an apocalyptic number.

It is an amenable number.

40320232 is a deficient number, since it is larger than the sum of its proper divisors (37324028).

40320232 is a wasteful number, since it uses less digits than its factorization.

40320232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136260 (or 136256 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 40320232 is about 6349.8214148116. The cubic root of 40320232 is about 342.9054129790.

Adding to 40320232 its reverse (23202304), we get a palindrome (63522536).

It can be divided in two parts, 403202 and 32, that multiplied together give a square (12902464 = 3592²).

The spelling of 40320232 in words is "forty million, three hundred twenty thousand, two hundred thirty-two".