398550849 has 16 divisors (see below), whose sum is σ = 549089280. Its totient is φ = 256873680.

The previous prime is 398550827. The next prime is 398550853. The reversal of 398550849 is 948055893.

It is a happy number.

It is not a de Polignac number, because 398550849 - 2⁷ = 398550721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398550899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149244 + ... + 151890.

It is an arithmetic number, because the mean of its divisors is an integer number (34318080).

Almost surely, 2^398550849 is an apocalyptic number.

It is an amenable number.

398550849 is a deficient number, since it is larger than the sum of its proper divisors (150538431).

398550849 is a wasteful number, since it uses less digits than its factorization.

398550849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 398550849 is about 19963.7383523227. The cubic root of 398550849 is about 735.9154367095.

The spelling of 398550849 in words is "three hundred ninety-eight million, five hundred fifty thousand, eight hundred forty-nine".