398520074 has 4 divisors (see below), whose sum is σ = 597780114. Its totient is φ = 199260036.

The previous prime is 398520071. The next prime is 398520107. The reversal of 398520074 is 470025893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470025893 = 71 ⋅6620083.

It can be written as a sum of positive squares in only one way, i.e., 386319025 + 12201049 = 19655^2 + 3493^2 .

It is not an unprimeable number, because it can be changed into a prime (398520071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99630017 + ... + 99630020.

Almost surely, 2^398520074 is an apocalyptic number.

398520074 is a deficient number, since it is larger than the sum of its proper divisors (199260040).

398520074 is a wasteful number, since it uses less digits than its factorization.

398520074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199260039.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 398520074 is about 19962.9675649689. The cubic root of 398520074 is about 735.8964944335.

The spelling of 398520074 in words is "three hundred ninety-eight million, five hundred twenty thousand, seventy-four".