40381441 has 4 divisors (see below), whose sum is σ = 42506800. Its totient is φ = 38256084.

The previous prime is 40381423. The next prime is 40381447. The reversal of 40381441 is 14418304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40381441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40381447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1062651 + ... + 1062688.

It is an arithmetic number, because the mean of its divisors is an integer number (10626700).

Almost surely, 2^40381441 is an apocalyptic number.

It is an amenable number.

40381441 is a deficient number, since it is larger than the sum of its proper divisors (2125359).

40381441 is a wasteful number, since it uses less digits than its factorization.

40381441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125358.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 40381441 is about 6354.6393288683. The cubic root of 40381441 is about 343.0788435740.

Adding to 40381441 its reverse (14418304), we get a palindrome (54799745).

The spelling of 40381441 in words is "forty million, three hundred eighty-one thousand, four hundred forty-one".