398358678 has 24 divisors (see below), whose sum is σ = 810492408. Its totient is φ = 130528768.

The previous prime is 398358661. The next prime is 398358679. The reversal of 398358678 is 876853893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398358679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11350 + ... + 30422.

It is an arithmetic number, because the mean of its divisors is an integer number (33770517).

Almost surely, 2^398358678 is an apocalyptic number.

398358678 is an abundant number, since it is smaller than the sum of its proper divisors (412133730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398358678 is a wasteful number, since it uses less digits than its factorization.

398358678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19196 (or 19137 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The square root of 398358678 is about 19958.9247706383. The cubic root of 398358678 is about 735.7971378426.

The spelling of 398358678 in words is "three hundred ninety-eight million, three hundred fifty-eight thousand, six hundred seventy-eight".