40455405 has 12 divisors (see below), whose sum is σ = 70122780. Its totient is φ = 21576192.

The previous prime is 40455361. The next prime is 40455407. The reversal of 40455405 is 50455404.

It can be written as a sum of positive squares in 2 ways, for example, as 17816841 + 22638564 = 4221^2 + 4758^2 .

It is not a de Polignac number, because 40455405 - 2⁷ = 40455277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40455407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449460 + ... + 449549.

It is an arithmetic number, because the mean of its divisors is an integer number (5843565).

Almost surely, 2^40455405 is an apocalyptic number.

40455405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40455405 is a deficient number, since it is larger than the sum of its proper divisors (29667375).

40455405 is a wasteful number, since it uses less digits than its factorization.

40455405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899020 (or 899017 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 40455405 is about 6360.4563515521. The cubic root of 40455405 is about 343.2881807171.

Subtracting 40455405 from its reverse (50455404), we obtain a palindrome (9999999).

The spelling of 40455405 in words is "forty million, four hundred fifty-five thousand, four hundred five".