40404229 has 8 divisors (see below), whose sum is σ = 41774040. Its totient is φ = 39052800.

The previous prime is 40404209. The next prime is 40404233. The reversal of 40404229 is 92240404.

It can be written as a sum of positive squares in 4 ways, for example, as 11492100 + 28912129 = 3390^2 + 5377^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40404229 - 2⁷ = 40404101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404209) 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, 52 + ... + 8989.

It is an arithmetic number, because the mean of its divisors is an integer number (5221755).

Almost surely, 2^40404229 is an apocalyptic number.

It is an amenable number.

40404229 is a deficient number, since it is larger than the sum of its proper divisors (1369811).

40404229 is a wasteful number, since it uses less digits than its factorization.

40404229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9191.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40404229 is about 6356.4320967033. The cubic root of 40404229 is about 343.1433667009.

The spelling of 40404229 in words is "forty million, four hundred four thousand, two hundred twenty-nine".