1780039643228 has 96 divisors (see below), whose sum is σ = 4097845516800. Its totient is φ = 655459257600.

The previous prime is 1780039643191. The next prime is 1780039643273. The reversal of 1780039643228 is 8223469300871.

It is a super-2 number, since 2×1780039643228² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1780039643228.

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, 2102438 + ... + 2824946.

It is an arithmetic number, because the mean of its divisors is an integer number (42685890800).

Almost surely, 2^{1780039643228} 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 1780039643228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048922758400).

1780039643228 is an abundant number, since it is smaller than the sum of its proper divisors (2317805873572).

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

1780039643228 is a wasteful number, since it uses less digits than its factorization.

1780039643228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722971 (or 722969 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 1780039643228 in words is "one trillion, seven hundred eighty billion, thirty-nine million, six hundred forty-three thousand, two hundred twenty-eight".