40523420 has 24 divisors (see below), whose sum is σ = 97256544. Its totient is φ = 13893696.

The previous prime is 40523419. The next prime is 40523449. The reversal of 40523420 is 2432504.

40523420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40523392 and 40523401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144587 + ... + 144866.

It is an arithmetic number, because the mean of its divisors is an integer number (4052356).

Almost surely, 2^40523420 is an apocalyptic number.

It is an amenable number.

40523420 is an abundant number, since it is smaller than the sum of its proper divisors (56733124).

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

40523420 is a wasteful number, since it uses less digits than its factorization.

40523420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289469 (or 289467 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40523420 is about 6365.8008137233. The cubic root of 40523420 is about 343.4804555846.

Adding to 40523420 its reverse (2432504), we get a palindrome (42955924).

The spelling of 40523420 in words is "forty million, five hundred twenty-three thousand, four hundred twenty".