398843997 has 8 divisors (see below), whose sum is σ = 532573344. Its totient is φ = 265505328.

The previous prime is 398843983. The next prime is 398844007. The reversal of 398843997 is 799348893.

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

It is not a de Polignac number, because 398843997 - 2⁷ = 398843869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 398843997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398843197) 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, 95278 + ... + 99375.

It is an arithmetic number, because the mean of its divisors is an integer number (66571668).

Almost surely, 2^398843997 is an apocalyptic number.

It is an amenable number.

398843997 is a deficient number, since it is larger than the sum of its proper divisors (133729347).

398843997 is a wasteful number, since it uses less digits than its factorization.

398843997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195339.

The product of its digits is 11757312, while the sum is 60.

The square root of 398843997 is about 19971.0790144148. The cubic root of 398843997 is about 736.0958229494.

The spelling of 398843997 in words is "three hundred ninety-eight million, eight hundred forty-three thousand, nine hundred ninety-seven".