40404001 has 4 divisors (see below), whose sum is σ = 44077104. Its totient is φ = 36730900.

The previous prime is 40403999. The next prime is 40404017. The reversal of 40404001 is 10040404.

It is a happy number.

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 not a de Polignac number, because 40404001 - 2¹ = 40403999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40404101) 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, 1836535 + ... + 1836556.

It is an arithmetic number, because the mean of its divisors is an integer number (11019276).

Almost surely, 2^40404001 is an apocalyptic number.

It is an amenable number.

40404001 is a deficient number, since it is larger than the sum of its proper divisors (3673103).

40404001 is a wasteful number, since it uses less digits than its factorization.

40404001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673102.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 40404001 is about 6356.4141620886. The cubic root of 40404001 is about 343.1427212500.

Adding to 40404001 its reverse (10040404), we get a palindrome (50444405).

The spelling of 40404001 in words is "forty million, four hundred four thousand, one".