40038545 has 4 divisors (see below), whose sum is σ = 48046260. Its totient is φ = 32030832.

The previous prime is 40038539. The next prime is 40038563. The reversal of 40038545 is 54583004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16777216 + 23261329 = 4096^2 + 4823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40038545 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 3 ways as a sum of consecutive naturals, for example, 4003850 + ... + 4003859.

It is an arithmetic number, because the mean of its divisors is an integer number (12011565).

Almost surely, 2^40038545 is an apocalyptic number.

It is an amenable number.

40038545 is a deficient number, since it is larger than the sum of its proper divisors (8007715).

40038545 is an equidigital number, since it uses as much as digits as its factorization.

40038545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007714.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 40038545 is about 6327.6018363990. The cubic root of 40038545 is about 342.1050057737.

The spelling of 40038545 in words is "forty million, thirty-eight thousand, five hundred forty-five".