40242020 has 48 divisors (see below), whose sum is σ = 104014848. Its totient is φ = 12735360.

The previous prime is 40241989. The next prime is 40242079. The reversal of 40242020 is 2024204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 40241986 and 40242004.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9236 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (2166976).

Almost surely, 2^40242020 is an apocalyptic number.

It is an amenable number.

40242020 is an abundant number, since it is smaller than the sum of its proper divisors (63772828).

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

40242020 is a wasteful number, since it uses less digits than its factorization.

40242020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22140 (or 22138 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40242020 is about 6343.6598269453. The cubic root of 40242020 is about 342.6835501850.

Adding to 40242020 its reverse (2024204), we get a palindrome (42266224).

The spelling of 40242020 in words is "forty million, two hundred forty-two thousand, twenty".