398990076578 has 8 divisors (see below), whose sum is σ = 598488046572. Its totient is φ = 199494061056.

The previous prime is 398990076577. The next prime is 398990076581. The reversal of 398990076578 is 875670099893.

It can be written as a sum of positive squares in 2 ways, for example, as 398732891209 + 257185369 = 631453^2 + 16037^2 .

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

It is not an unprimeable number, because it can be changed into a prime (398990076577) 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, 237626 + ... + 924362.

Almost surely, 2^398990076578 is an apocalyptic number.

398990076578 is a deficient number, since it is larger than the sum of its proper divisors (199497969994).

398990076578 is a wasteful number, since it uses less digits than its factorization.

398990076578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977236.

The product of its (nonzero) digits is 205752960, while the sum is 71.

The spelling of 398990076578 in words is "three hundred ninety-eight billion, nine hundred ninety million, seventy-six thousand, five hundred seventy-eight".