40689525 has 24 divisors (see below), whose sum is σ = 67567104. Its totient is φ = 21606400.

The previous prime is 40689497. The next prime is 40689557. The reversal of 40689525 is 52598604.

It is a de Polignac number, because none of the positive numbers 2^k-40689525 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18220 + ... + 20330.

It is an arithmetic number, because the mean of its divisors is an integer number (2815296).

Almost surely, 2^40689525 is an apocalyptic number.

It is an amenable number.

40689525 is a deficient number, since it is larger than the sum of its proper divisors (26877579).

40689525 is a wasteful number, since it uses less digits than its factorization.

40689525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 40689525 is about 6378.8341411264. The cubic root of 40689525 is about 343.9491231996.

It can be divided in two parts, 40689 and 525, that added together give a palindrome (41214).

The spelling of 40689525 in words is "forty million, six hundred eighty-nine thousand, five hundred twenty-five".