40040120 has 16 divisors (see below), whose sum is σ = 90090360. Its totient is φ = 16016032.

The previous prime is 40040111. The next prime is 40040129. The reversal of 40040120 is 2104004.

It is an interprime number because it is at equal distance from previous prime (40040111) and next prime (40040129).

It is a super-2 number, since 2×40040120² = 3206422419228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500462 + ... + 500541.

Almost surely, 2^40040120 is an apocalyptic number.

40040120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040120 is an abundant number, since it is smaller than the sum of its proper divisors (50050240).

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

40040120 is a wasteful number, since it uses less digits than its factorization.

40040120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001014 (or 1001010 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40040120 is about 6327.7262899086. The cubic root of 40040120 is about 342.1094915205.

Adding to 40040120 its reverse (2104004), we get a palindrome (42144124).

The spelling of 40040120 in words is "forty million, forty thousand, one hundred twenty".