40539789 has 12 divisors (see below), whose sum is σ = 58614816. Its totient is φ = 27000072.

The previous prime is 40539743. The next prime is 40539833. The reversal of 40539789 is 98793504.

40539789 is a `hidden beast` number, since 40 + 539 + 78 + 9 = 666.

40539789 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 40539789 - 2¹³ = 40531597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40539739) 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 11 ways as a sum of consecutive naturals, for example, 13062 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (4884568).

Almost surely, 2^40539789 is an apocalyptic number.

It is an amenable number.

40539789 is a deficient number, since it is larger than the sum of its proper divisors (18075027).

40539789 is a wasteful number, since it uses less digits than its factorization.

40539789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 40539789 is about 6367.0863823259. The cubic root of 40539789 is about 343.5266977717.

It can be divided in two parts, 40539 and 789, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 40539789 in words is "forty million, five hundred thirty-nine thousand, seven hundred eighty-nine".