40525138 has 36 divisors (see below), whose sum is σ = 67544442. Its totient is φ = 18221760.

The previous prime is 40525109. The next prime is 40525181. The reversal of 40525138 is 83152504.

40525138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 38601369 + 1923769 = 6213^2 + 1387^2 .

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 17 ways as a sum of consecutive naturals, for example, 988398 + ... + 988438.

Almost surely, 2^40525138 is an apocalyptic number.

40525138 is a deficient number, since it is larger than the sum of its proper divisors (27019304).

40525138 is a wasteful number, since it uses less digits than its factorization.

40525138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 40525138 is about 6365.9357521106. The cubic root of 40525138 is about 343.4853094945.

The spelling of 40525138 in words is "forty million, five hundred twenty-five thousand, one hundred thirty-eight".