398447658 has 24 divisors (see below), whose sum is σ = 986632608. Its totient is φ = 113842152.

The previous prime is 398447657. The next prime is 398447659. The reversal of 398447658 is 856744893.

It is an interprime number because it is at equal distance from previous prime (398447657) and next prime (398447659).

It is not an unprimeable number, because it can be changed into a prime (398447657) 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, 1581016 + ... + 1581267.

It is an arithmetic number, because the mean of its divisors is an integer number (41109692).

Almost surely, 2^398447658 is an apocalyptic number.

398447658 is an abundant number, since it is smaller than the sum of its proper divisors (588184950).

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

398447658 is a wasteful number, since it uses less digits than its factorization.

398447658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162298 (or 3162295 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 398447658 is about 19961.1537241714. The cubic root of 398447658 is about 735.8519179180.

The spelling of 398447658 in words is "three hundred ninety-eight million, four hundred forty-seven thousand, six hundred fifty-eight".