398479849 has 4 divisors (see below), whose sum is σ = 399011200. Its totient is φ = 397948500.

The previous prime is 398479841. The next prime is 398479883. The reversal of 398479849 is 948974893.

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, and also an emirpimes, since its reverse is a distinct semiprime: 948974893 = 19 ⋅49946047.

It is a cyclic number.

It is not a de Polignac number, because 398479849 - 2³ = 398479841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398479841) 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, 264549 + ... + 266050.

It is an arithmetic number, because the mean of its divisors is an integer number (99752800).

Almost surely, 2^398479849 is an apocalyptic number.

It is an amenable number.

398479849 is a deficient number, since it is larger than the sum of its proper divisors (531351).

398479849 is an equidigital number, since it uses as much as digits as its factorization.

398479849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531350.

The product of its digits is 15676416, while the sum is 61.

The square root of 398479849 is about 19961.9600490533. The cubic root of 398479849 is about 735.8717341312.

The spelling of 398479849 in words is "three hundred ninety-eight million, four hundred seventy-nine thousand, eight hundred forty-nine".