40320330 has 16 divisors (see below), whose sum is σ = 96768864. Its totient is φ = 10752080.

The previous prime is 40320323. The next prime is 40320331. The reversal of 40320330 is 3302304.

It is a super-2 number, since 2×40320330² = 3251458022617800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (40320331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671976 + ... + 672035.

It is an arithmetic number, because the mean of its divisors is an integer number (6048054).

Almost surely, 2^40320330 is an apocalyptic number.

40320330 is an abundant number, since it is smaller than the sum of its proper divisors (56448534).

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

40320330 is a wasteful number, since it uses less digits than its factorization.

40320330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344021.

The product of its (nonzero) digits is 216, while the sum is 15.

The square root of 40320330 is about 6349.8291315594. The cubic root of 40320330 is about 342.9056907940.

Adding to 40320330 its reverse (3302304), we get a palindrome (43622634).

The spelling of 40320330 in words is "forty million, three hundred twenty thousand, three hundred thirty".