198238835970 has 512 divisors, whose sum is σ = 642539520000. Its totient is φ = 43421495040.

The previous prime is 198238835957. The next prime is 198238836043. The reversal of 198238835970 is 79538832891.

198238835970 is a `hidden beast` number, since 1 + 9 + 8 + 2 + 38 + 8 + 3 + 597 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 198238835898 and 198238835907.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 598908705 + ... + 598909035.

It is an arithmetic number, because the mean of its divisors is an integer number (1254960000).

Almost surely, 2^198238835970 is an apocalyptic number.

198238835970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 198238835970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321269760000).

198238835970 is an abundant number, since it is smaller than the sum of its proper divisors (444300684030).

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

198238835970 is a wasteful number, since it uses less digits than its factorization.

198238835970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 198238835970 in words is "one hundred ninety-eight billion, two hundred thirty-eight million, eight hundred thirty-five thousand, nine hundred seventy".