40123020 has 48 divisors (see below), whose sum is σ = 128395008. Its totient is φ = 9170880.

The previous prime is 40123001. The next prime is 40123049. The reversal of 40123020 is 2032104.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 40122987 and 40123005.

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, 47346 + ... + 48185.

It is an arithmetic number, because the mean of its divisors is an integer number (2674896).

Almost surely, 2^40123020 is an apocalyptic number.

It is an amenable number.

40123020 is an abundant number, since it is smaller than the sum of its proper divisors (88271988).

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

40123020 is a wasteful number, since it uses less digits than its factorization.

40123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95550 (or 95548 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40123020 is about 6334.2734389984. The cubic root of 40123020 is about 342.3454325909.

Adding to 40123020 its reverse (2032104), we get a palindrome (42155124).

The spelling of 40123020 in words is "forty million, one hundred twenty-three thousand, twenty".