404198729 has 4 divisors (see below), whose sum is σ = 440944080. Its totient is φ = 367453380.

The previous prime is 404198719. The next prime is 404198741. The reversal of 404198729 is 927891404.

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 404198729 - 2⁴ = 404198713 is a prime.

It is a super-2 number, since 2×404198729² = 326753225050430882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404198729.

It is not an unprimeable number, because it can be changed into a prime (404198719) 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 3 ways as a sum of consecutive naturals, for example, 18372659 + ... + 18372680.

It is an arithmetic number, because the mean of its divisors is an integer number (110236020).

Almost surely, 2^404198729 is an apocalyptic number.

It is an amenable number.

404198729 is a deficient number, since it is larger than the sum of its proper divisors (36745351).

404198729 is a wasteful number, since it uses less digits than its factorization.

404198729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36745350.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 404198729 is about 20104.6942030960. The cubic root of 404198729 is about 739.3753731991.

The spelling of 404198729 in words is "four hundred four million, one hundred ninety-eight thousand, seven hundred twenty-nine".