40661320 has 32 divisors (see below), whose sum is σ = 104558400. Its totient is φ = 13940928.

The previous prime is 40661317. The next prime is 40661321. The reversal of 40661320 is 2316604.

It is a junction number, because it is equal to n+sod(n) for n = 40661291 and 40661300.

It is not an unprimeable number, because it can be changed into a prime (40661321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72330 + ... + 72889.

It is an arithmetic number, because the mean of its divisors is an integer number (3267450).

Almost surely, 2^40661320 is an apocalyptic number.

40661320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40661320 is an abundant number, since it is smaller than the sum of its proper divisors (63897080).

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

40661320 is a wasteful number, since it uses less digits than its factorization.

40661320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145237 (or 145233 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40661320 is about 6376.6229306742. The cubic root of 40661320 is about 343.8696324101.

Adding to 40661320 its reverse (2316604), we get a palindrome (42977924).

The spelling of 40661320 in words is "forty million, six hundred sixty-one thousand, three hundred twenty".