40004455 has 4 divisors (see below), whose sum is σ = 48005352. Its totient is φ = 32003560.

The previous prime is 40004413. The next prime is 40004467. The reversal of 40004455 is 55440004.

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

It is not a de Polignac number, because 40004455 - 2²³ = 31615847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4000441 + ... + 4000450.

It is an arithmetic number, because the mean of its divisors is an integer number (12001338).

Almost surely, 2^40004455 is an apocalyptic number.

40004455 is a deficient number, since it is larger than the sum of its proper divisors (8000897).

40004455 is an equidigital number, since it uses as much as digits as its factorization.

40004455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8000896.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 40004455 is about 6324.9075092052. The cubic root of 40004455 is about 342.0078854354.

Adding to 40004455 its reverse (55440004), we get a palindrome (95444459).

The spelling of 40004455 in words is "forty million, four thousand, four hundred fifty-five".