40381545 has 16 divisors (see below), whose sum is σ = 68411520. Its totient is φ = 20269824.

The previous prime is 40381531. The next prime is 40381577. The reversal of 40381545 is 54518304.

It is not a de Polignac number, because 40381545 - 2⁴ = 40381529 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78925 + ... + 79434.

It is an arithmetic number, because the mean of its divisors is an integer number (4275720).

Almost surely, 2^40381545 is an apocalyptic number.

It is an amenable number.

40381545 is a deficient number, since it is larger than the sum of its proper divisors (28029975).

40381545 is a wasteful number, since it uses less digits than its factorization.

40381545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158384.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 40381545 is about 6354.6475118609. The cubic root of 40381545 is about 343.0791381002.

Adding to 40381545 its reverse (54518304), we get a palindrome (94899849).

The spelling of 40381545 in words is "forty million, three hundred eighty-one thousand, five hundred forty-five".