40423120 has 40 divisors (see below), whose sum is σ = 94279680. Its totient is φ = 16118400.

The previous prime is 40423109. The next prime is 40423133. The reversal of 40423120 is 2132404.

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 40423094 and 40423103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34545 + ... + 35695.

It is an arithmetic number, because the mean of its divisors is an integer number (2356992).

Almost surely, 2^40423120 is an apocalyptic number.

40423120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40423120 is an abundant number, since it is smaller than the sum of its proper divisors (53856560).

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

40423120 is a wasteful number, since it uses less digits than its factorization.

40423120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40423120 is about 6357.9178981802. The cubic root of 40423120 is about 343.1968372698.

Adding to 40423120 its reverse (2132404), we get a palindrome (42555524).

The spelling of 40423120 in words is "forty million, four hundred twenty-three thousand, one hundred twenty".