398838073 has 4 divisors (see below), whose sum is σ = 412591140. Its totient is φ = 385085008.

The previous prime is 398838061. The next prime is 398838127. The reversal of 398838073 is 370838893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370838893 = 71 ⋅5223083.

It can be written as a sum of positive squares in 2 ways, for example, as 171793449 + 227044624 = 13107^2 + 15068^2 .

It is a cyclic number.

It is not a de Polignac number, because 398838073 - 2¹³ = 398829881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398838023) 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, 6876490 + ... + 6876547.

It is an arithmetic number, because the mean of its divisors is an integer number (103147785).

Almost surely, 2^398838073 is an apocalyptic number.

It is an amenable number.

398838073 is a deficient number, since it is larger than the sum of its proper divisors (13753067).

398838073 is a wasteful number, since it uses less digits than its factorization.

398838073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753066.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 398838073 is about 19970.9306993941. The cubic root of 398838073 is about 736.0921785393.

The spelling of 398838073 in words is "three hundred ninety-eight million, eight hundred thirty-eight thousand, seventy-three".