40855407 has 4 divisors (see below), whose sum is σ = 54473880. Its totient is φ = 27236936.

The previous prime is 40855391. The next prime is 40855411. The reversal of 40855407 is 70455804.

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 40855407 - 2⁴ = 40855391 is a prime.

It is a super-2 number, since 2×40855407² = 3338328562271298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40855447) 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, 6809232 + ... + 6809237.

It is an arithmetic number, because the mean of its divisors is an integer number (13618470).

Almost surely, 2^40855407 is an apocalyptic number.

40855407 is a deficient number, since it is larger than the sum of its proper divisors (13618473).

40855407 is a wasteful number, since it uses less digits than its factorization.

40855407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13618472.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 40855407 is about 6391.8234487508. The cubic root of 40855407 is about 344.4158904260.

Multiplying 40855407 by its sum of digits (33), we get a palindrome (1348228431).

The spelling of 40855407 in words is "forty million, eight hundred fifty-five thousand, four hundred seven".