1867788228780 has 576 divisors, whose sum is σ = 6410434867200. Its totient is φ = 437834833920.

The previous prime is 1867788228767. The next prime is 1867788228809. The reversal of 1867788228780 is 878228877681.

1867788228780 is a `hidden beast` number, since 186 + 77 + 88 + 228 + 7 + 80 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1867788228699 and 1867788228708.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1254390276 + ... + 1254391764.

It is an arithmetic number, because the mean of its divisors is an integer number (11129227200).

Almost surely, 2^{1867788228780} is an apocalyptic number.

1867788228780 is a gapful number since it is divisible by the number (10) 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 1867788228780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3205217433600).

1867788228780 is an abundant number, since it is smaller than the sum of its proper divisors (4542646638420).

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

1867788228780 is a wasteful number, since it uses less digits than its factorization.

1867788228780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 269746176, while the sum is 72.

The spelling of 1867788228780 in words is "one trillion, eight hundred sixty-seven billion, seven hundred eighty-eight million, two hundred twenty-eight thousand, seven hundred eighty".