40820164 has 24 divisors (see below), whose sum is σ = 89062848. Its totient is φ = 15903840.

The previous prime is 40820161. The next prime is 40820177. The reversal of 40820164 is 46102804.

40820164 is nontrivially palindromic in base 13.

It is not an unprimeable number, because it can be changed into a prime (40820161) 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, 65959 + ... + 66574.

It is an arithmetic number, because the mean of its divisors is an integer number (3710952).

Almost surely, 2^40820164 is an apocalyptic number.

40820164 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40820164 is an abundant number, since it is smaller than the sum of its proper divisors (48242684).

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

40820164 is a wasteful number, since it uses less digits than its factorization.

40820164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132555 (or 132553 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 40820164 is about 6389.0659724251. The cubic root of 40820164 is about 344.3168277229.

Adding to 40820164 its reverse (46102804), we get a palindrome (86922968).

The spelling of 40820164 in words is "forty million, eight hundred twenty thousand, one hundred sixty-four".