398386247 has 4 divisors (see below), whose sum is σ = 455298576. Its totient is φ = 341473920.

The previous prime is 398386223. The next prime is 398386291. The reversal of 398386247 is 742683893.

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

It is a cyclic number.

It is not a de Polignac number, because 398386247 - 2¹⁴ = 398369863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398386195 and 398386204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398380247) 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, 28456154 + ... + 28456167.

It is an arithmetic number, because the mean of its divisors is an integer number (113824644).

Almost surely, 2^398386247 is an apocalyptic number.

398386247 is a deficient number, since it is larger than the sum of its proper divisors (56912329).

398386247 is an equidigital number, since it uses as much as digits as its factorization.

398386247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56912328.

The product of its digits is 1741824, while the sum is 50.

The square root of 398386247 is about 19959.6154021063. The cubic root of 398386247 is about 735.8141114266.

The spelling of 398386247 in words is "three hundred ninety-eight million, three hundred eighty-six thousand, two hundred forty-seven".