238404305898 has 96 divisors (see below), whose sum is σ = 567304238592. Its totient is φ = 71756820000.

The previous prime is 238404305863. The next prime is 238404305939. The reversal of 238404305898 is 898503404832.

238404305898 is a `hidden beast` number, since 2 + 38 + 40 + 430 + 58 + 98 = 666.

It is a super-2 number, since 2×238404305898² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74429965 + ... + 74433167.

It is an arithmetic number, because the mean of its divisors is an integer number (5909419152).

Almost surely, 2^238404305898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238404305898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283652119296).

238404305898 is an abundant number, since it is smaller than the sum of its proper divisors (328899932694).

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

238404305898 is a wasteful number, since it uses less digits than its factorization.

238404305898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5640 (or 5637 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 238404305898 in words is "two hundred thirty-eight billion, four hundred four million, three hundred five thousand, eight hundred ninety-eight".