40113320 has 32 divisors (see below), whose sum is σ = 97198920. Its totient is φ = 14810880.

The previous prime is 40113317. The next prime is 40113329. The reversal of 40113320 is 2331104.

It can be written as a sum of positive squares in 4 ways, for example, as 22791076 + 17322244 = 4774^2 + 4162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40113295 and 40113304.

It is not an unprimeable number, because it can be changed into a prime (40113329) 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, 38051 + ... + 39090.

Almost surely, 2^40113320 is an apocalyptic number.

40113320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40113320 is an abundant number, since it is smaller than the sum of its proper divisors (57085600).

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

40113320 is a wasteful number, since it uses less digits than its factorization.

40113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77165 (or 77161 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 40113320 is about 6333.5077168975. The cubic root of 40113320 is about 342.3178422921.

Adding to 40113320 its reverse (2331104), we get a palindrome (42444424).

The spelling of 40113320 in words is "forty million, one hundred thirteen thousand, three hundred twenty".