40440427 has 4 divisors (see below), whose sum is σ = 40461696. Its totient is φ = 40419160.

The previous prime is 40440419. The next prime is 40440451. The reversal of 40440427 is 72404404.

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

It is a cyclic number.

It is not a de Polignac number, because 40440427 - 2³ = 40440419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40440497) 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, 7468 + ... + 11689.

It is an arithmetic number, because the mean of its divisors is an integer number (10115424).

Almost surely, 2^40440427 is an apocalyptic number.

40440427 is a deficient number, since it is larger than the sum of its proper divisors (21269).

40440427 is a wasteful number, since it uses less digits than its factorization.

40440427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21268.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 40440427 is about 6359.2788113119. The cubic root of 40440427 is about 343.2458097405.

The spelling of 40440427 in words is "forty million, four hundred forty thousand, four hundred twenty-seven".