40440361 has 4 divisors (see below), whose sum is σ = 43551172. Its totient is φ = 37329552.

The previous prime is 40440359. The next prime is 40440373. The reversal of 40440361 is 16304404.

It is a happy number.

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 14745600 + 25694761 = 3840^2 + 5069^2 .

It is not a de Polignac number, because 40440361 - 2¹ = 40440359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40440661) 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, 1555386 + ... + 1555411.

It is an arithmetic number, because the mean of its divisors is an integer number (10887793).

Almost surely, 2^40440361 is an apocalyptic number.

It is an amenable number.

40440361 is a deficient number, since it is larger than the sum of its proper divisors (3110811).

40440361 is a wasteful number, since it uses less digits than its factorization.

40440361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110810.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 40440361 is about 6359.2736220421. The cubic root of 40440361 is about 343.2456230112.

Adding to 40440361 its reverse (16304404), we get a palindrome (56744765).

The spelling of 40440361 in words is "forty million, four hundred forty thousand, three hundred sixty-one".