40123120 has 40 divisors (see below), whose sum is σ = 95056416. Its totient is φ = 15744768.

The previous prime is 40123099. The next prime is 40123121. The reversal of 40123120 is 2132104.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 40123120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123121) 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, 492 + ... + 8971.

Almost surely, 2^40123120 is an apocalyptic number.

40123120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40123120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47528208).

40123120 is an abundant number, since it is smaller than the sum of its proper divisors (54933296).

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

40123120 is a wasteful number, since it uses less digits than its factorization.

40123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9529 (or 9523 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 40123120 is about 6334.2813325586. The cubic root of 40123120 is about 342.3457170038.

Adding to 40123120 its reverse (2132104), we get a palindrome (42255224).

The spelling of 40123120 in words is "forty million, one hundred twenty-three thousand, one hundred twenty".