40002320 has 20 divisors (see below), whose sum is σ = 93005580. Its totient is φ = 16000896.

The previous prime is 40002301. The next prime is 40002329. The reversal of 40002320 is 2320004.

It can be written as a sum of positive squares in 2 ways, for example, as 27836176 + 12166144 = 5276^2 + 3488^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (40002329) 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, 249935 + ... + 250094.

It is an arithmetic number, because the mean of its divisors is an integer number (4650279).

Almost surely, 2^40002320 is an apocalyptic number.

40002320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40002320 is an abundant number, since it is smaller than the sum of its proper divisors (53003260).

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

40002320 is a wasteful number, since it uses less digits than its factorization.

40002320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500042 (or 500036 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 40002320 is about 6324.7387297817. The cubic root of 40002320 is about 342.0018011145.

Adding to 40002320 its reverse (2320004), we get a palindrome (42322324).

The spelling of 40002320 in words is "forty million, two thousand, three hundred twenty".