40320436 has 12 divisors (see below), whose sum is σ = 75988612. Its totient is φ = 18609408.

The previous prime is 40320431. The next prime is 40320461. The reversal of 40320436 is 63402304.

It can be written as a sum of positive squares in 2 ways, for example, as 9960336 + 30360100 = 3156^2 + 5510^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40320431) 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, 387645 + ... + 387748.

Almost surely, 2^40320436 is an apocalyptic number.

It is an amenable number.

40320436 is a deficient number, since it is larger than the sum of its proper divisors (35668176).

40320436 is a wasteful number, since it uses less digits than its factorization.

40320436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775410 (or 775408 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 40320436 is about 6349.8374782352. The cubic root of 40320436 is about 342.9059912874.

The spelling of 40320436 in words is "forty million, three hundred twenty thousand, four hundred thirty-six".