398626998 has 48 divisors (see below), whose sum is σ = 1001521920. Its totient is φ = 103538160.

The previous prime is 398626993. The next prime is 398627023. The reversal of 398626998 is 899626893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398626993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34138 + ... + 44301.

It is an arithmetic number, because the mean of its divisors is an integer number (20865040).

Almost surely, 2^398626998 is an apocalyptic number.

398626998 is an abundant number, since it is smaller than the sum of its proper divisors (602894922).

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

398626998 is a wasteful number, since it uses less digits than its factorization.

398626998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78473 (or 78462 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 60.

The square root of 398626998 is about 19965.6454441122. The cubic root of 398626998 is about 735.9623028798.

The spelling of 398626998 in words is "three hundred ninety-eight million, six hundred twenty-six thousand, nine hundred ninety-eight".