228726831780 has 384 divisors, whose sum is σ = 751074508800. Its totient is φ = 57675898368.

The previous prime is 228726831713. The next prime is 228726831791. The reversal of 228726831780 is 87138627822.

228726831780 is a `hidden beast` number, since 2 + 287 + 268 + 31 + 78 + 0 = 666.

228726831780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228726831780² (a number of 24 digits) contains 22 as substring.

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 127 ways as a sum of consecutive naturals, for example, 745038387 + ... + 745038693.

It is an arithmetic number, because the mean of its divisors is an integer number (1955923200).

Almost surely, 2^228726831780 is an apocalyptic number.

228726831780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228726831780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375537254400).

228726831780 is an abundant number, since it is smaller than the sum of its proper divisors (522347677020).

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

228726831780 is a wasteful number, since it uses less digits than its factorization.

228726831780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 228726831780 in words is "two hundred twenty-eight billion, seven hundred twenty-six million, eight hundred thirty-one thousand, seven hundred eighty".