40555405 has 24 divisors (see below), whose sum is σ = 56170080. Its totient is φ = 27800640.

The previous prime is 40555399. The next prime is 40555433. The reversal of 40555405 is 50455504.

It is not a de Polignac number, because 40555405 - 2³ = 40555397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205767 + ... + 205963.

It is an arithmetic number, because the mean of its divisors is an integer number (2340420).

Almost surely, 2^40555405 is an apocalyptic number.

It is an amenable number.

40555405 is a deficient number, since it is larger than the sum of its proper divisors (15614675).

40555405 is a wasteful number, since it uses less digits than its factorization.

40555405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 40555405 is about 6368.3125708464. The cubic root of 40555405 is about 343.5708011443.

Subtracting 40555405 from its reverse (50455504), we obtain a palindrome (9900099).

The spelling of 40555405 in words is "forty million, five hundred fifty-five thousand, four hundred five".