40320988 has 6 divisors (see below), whose sum is σ = 70561736. Its totient is φ = 20160492.

The previous prime is 40320967. The next prime is 40320989. The reversal of 40320988 is 88902304.

It is a super-2 number, since 2×40320988² = 3251564146592288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40320989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5040120 + ... + 5040127.

Almost surely, 2^40320988 is an apocalyptic number.

It is an amenable number.

40320988 is a deficient number, since it is larger than the sum of its proper divisors (30240748).

40320988 is a wasteful number, since it uses less digits than its factorization.

40320988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10080251 (or 10080249 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 40320988 is about 6349.8809437658. The cubic root of 40320988 is about 342.9075561121.

The spelling of 40320988 in words is "forty million, three hundred twenty thousand, nine hundred eighty-eight".