238305056778 has 112 divisors (see below), whose sum is σ = 559379116296. Its totient is φ = 76034350080.

The previous prime is 238305056761. The next prime is 238305056839. The reversal of 238305056778 is 877650503832.

238305056778 is a `hidden beast` number, since 2 + 3 + 8 + 3 + 0 + 5 + 0 + 567 + 78 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 108166658769 + 130138398009 = 328887^2 + 360747^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3130626 + ... + 3205842.

Almost surely, 2^238305056778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 238305056778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279689558148).

238305056778 is an abundant number, since it is smaller than the sum of its proper divisors (321074059518).

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

238305056778 is an equidigital number, since it uses as much as digits as its factorization.

238305056778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75331 (or 75316 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 238305056778 in words is "two hundred thirty-eight billion, three hundred five million, fifty-six thousand, seven hundred seventy-eight".