40028523 has 24 divisors (see below), whose sum is σ = 57278832. Its totient is φ = 24858624.

The previous prime is 40028519. The next prime is 40028531. The reversal of 40028523 is 32582004.

40028523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40028523 - 2² = 40028519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40028493 and 40028502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40028503) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 118611 + ... + 118947.

It is an arithmetic number, because the mean of its divisors is an integer number (2386618).

Almost surely, 2^40028523 is an apocalyptic number.

40028523 is a deficient number, since it is larger than the sum of its proper divisors (17250309).

40028523 is a wasteful number, since it uses less digits than its factorization.

40028523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40028523 is about 6326.8098596370. The cubic root of 40028523 is about 342.0764594277.

The spelling of 40028523 in words is "forty million, twenty-eight thousand, five hundred twenty-three".