238661407896 has 128 divisors (see below), whose sum is σ = 634894848000. Its totient is φ = 74594144768.

The previous prime is 238661407861. The next prime is 238661407903. The reversal of 238661407896 is 698704166832.

It is a super-2 number, since 2×238661407896² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42096550 + ... + 42102218.

It is an arithmetic number, because the mean of its divisors is an integer number (4960116000).

Almost surely, 2^238661407896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238661407896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317447424000).

238661407896 is an abundant number, since it is smaller than the sum of its proper divisors (396233440104).

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

238661407896 is a wasteful number, since it uses less digits than its factorization.

238661407896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7193 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 60.

The spelling of 238661407896 in words is "two hundred thirty-eight billion, six hundred sixty-one million, four hundred seven thousand, eight hundred ninety-six".