1978200928704 has 896 divisors, whose sum is σ = 7681254948864. Its totient is φ = 431972352000.

The previous prime is 1978200928663. The next prime is 1978200928747. The reversal of 1978200928704 is 4078290028791.

It is a super-2 number, since 2×1978200928704² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 101275419 + ... + 101294949.

It is an arithmetic number, because the mean of its divisors is an integer number (8572829184).

Almost surely, 2^{1978200928704} is an apocalyptic number.

1978200928704 is a gapful number since it is divisible by the number (14) 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 1978200928704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3840627474432).

1978200928704 is an abundant number, since it is smaller than the sum of its proper divisors (5703054020160).

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

1978200928704 is a wasteful number, since it uses less digits than its factorization.

1978200928704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19625 (or 19615 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 57.

The spelling of 1978200928704 in words is "one trillion, nine hundred seventy-eight billion, two hundred million, nine hundred twenty-eight thousand, seven hundred four".