40820112 has 60 divisors (see below), whose sum is σ = 118482000. Its totient is φ = 13605408.

The previous prime is 40820107. The next prime is 40820119. The reversal of 40820112 is 21102804.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40820119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1362 + ... + 9137.

It is an arithmetic number, because the mean of its divisors is an integer number (1974700).

Almost surely, 2^40820112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40820112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59241000).

40820112 is an abundant number, since it is smaller than the sum of its proper divisors (77661888).

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

40820112 is a wasteful number, since it uses less digits than its factorization.

40820112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522 (or 10504 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 40820112 is about 6389.0619029714. The cubic root of 40820112 is about 344.3166815167.

Adding to 40820112 its sum of digits (18), we get a triangular number (40820130 = T₉₀₃₅).

Adding to 40820112 its reverse (21102804), we get a palindrome (61922916).

The spelling of 40820112 in words is "forty million, eight hundred twenty thousand, one hundred twelve".