40405803 has 8 divisors (see below), whose sum is σ = 55612416. Its totient is φ = 26068200.

The previous prime is 40405793. The next prime is 40405843. The reversal of 40405803 is 30850404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40405803 - 2¹⁰ = 40404779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40405843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217143 + ... + 217328.

It is an arithmetic number, because the mean of its divisors is an integer number (6951552).

Almost surely, 2^40405803 is an apocalyptic number.

40405803 is a deficient number, since it is larger than the sum of its proper divisors (15206613).

40405803 is a wasteful number, since it uses less digits than its factorization.

40405803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434505.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 40405803 is about 6356.5559070931. Note that the first 3 decimals coincide. The cubic root of 40405803 is about 343.1478225104.

The spelling of 40405803 in words is "forty million, four hundred five thousand, eight hundred three".