398444722 has 8 divisors (see below), whose sum is σ = 643641516. Its totient is φ = 183897552.

The previous prime is 398444719. The next prime is 398444743. The reversal of 398444722 is 227444893.

It can be written as a sum of positive squares in 2 ways, for example, as 312900721 + 85544001 = 17689^2 + 9249^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7662373 + ... + 7662424.

Almost surely, 2^398444722 is an apocalyptic number.

398444722 is a deficient number, since it is larger than the sum of its proper divisors (245196794).

398444722 is a wasteful number, since it uses less digits than its factorization.

398444722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15324812.

The product of its digits is 387072, while the sum is 43.

The square root of 398444722 is about 19961.0801811926. The cubic root of 398444722 is about 735.8501105150.

The spelling of 398444722 in words is "three hundred ninety-eight million, four hundred forty-four thousand, seven hundred twenty-two".