40205506 has 16 divisors (see below), whose sum is σ = 65888640. Its totient is φ = 18248080.

The previous prime is 40205471. The next prime is 40205507. The reversal of 40205506 is 60550204.

40205506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (40205507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26295 + ... + 27781.

It is an arithmetic number, because the mean of its divisors is an integer number (4118040).

Almost surely, 2^40205506 is an apocalyptic number.

40205506 is a deficient number, since it is larger than the sum of its proper divisors (25683134).

40205506 is a wasteful number, since it uses less digits than its factorization.

40205506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40205506 is about 6340.7811821573. The cubic root of 40205506 is about 342.5798730370.

The spelling of 40205506 in words is "forty million, two hundred five thousand, five hundred six".