400191229 has 4 divisors (see below), whose sum is σ = 408705984. Its totient is φ = 391676476.

The previous prime is 400191221. The next prime is 400191241. The reversal of 400191229 is 922191004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400191229 - 2³ = 400191221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400191197 and 400191206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400191221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4257307 + ... + 4257400.

It is an arithmetic number, because the mean of its divisors is an integer number (102176496).

Almost surely, 2^400191229 is an apocalyptic number.

It is an amenable number.

400191229 is a deficient number, since it is larger than the sum of its proper divisors (8514755).

400191229 is an equidigital number, since it uses as much as digits as its factorization.

400191229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8514754.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 400191229 is about 20004.7801537533. The cubic root of 400191229 is about 736.9236966319.

The spelling of 400191229 in words is "four hundred million, one hundred ninety-one thousand, two hundred twenty-nine".