398810429 has 4 divisors (see below), whose sum is σ = 422269884. Its totient is φ = 375350976.

The previous prime is 398810417. The next prime is 398810431. The reversal of 398810429 is 924018893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 262504804 + 136305625 = 16202^2 + 11675^2 .

It is a cyclic number.

It is not a de Polignac number, because 398810429 - 2⁴ = 398810413 is a prime.

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 398810429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398810729) 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, 11729702 + ... + 11729735.

It is an arithmetic number, because the mean of its divisors is an integer number (105567471).

Almost surely, 2^398810429 is an apocalyptic number.

It is an amenable number.

398810429 is a deficient number, since it is larger than the sum of its proper divisors (23459455).

398810429 is a wasteful number, since it uses less digits than its factorization.

398810429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23459454.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 398810429 is about 19970.2385814491. The cubic root of 398810429 is about 736.0751716354.

The spelling of 398810429 in words is "three hundred ninety-eight million, eight hundred ten thousand, four hundred twenty-nine".