78231759228 has 576 divisors, whose sum is σ = 261358755840. Its totient is φ = 19947679488.

The previous prime is 78231759223. The next prime is 78231759253. The reversal of 78231759228 is 82295713287.

78231759228 is a `hidden beast` number, since 7 + 8 + 23 + 1 + 7 + 592 + 28 = 666.

It is a super-2 number, since 2×78231759228² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78231759223) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 246787726 + ... + 246788042.

It is an arithmetic number, because the mean of its divisors is an integer number (453747840).

Almost surely, 2^78231759228 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 78231759228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130679377920).

78231759228 is an abundant number, since it is smaller than the sum of its proper divisors (183126996612).

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

78231759228 is a wasteful number, since it uses less digits than its factorization.

78231759228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 454 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 78231759228 in words is "seventy-eight billion, two hundred thirty-one million, seven hundred fifty-nine thousand, two hundred twenty-eight".