19798728440280 has 64 divisors (see below), whose sum is σ = 59422929112800. Its totient is φ = 5277283691520.

The previous prime is 19798728440237. The next prime is 19798728440321. The reversal of 19798728440280 is 8204482789791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36876525 + ... + 37409564.

Almost surely, 2^{19798728440280} is an apocalyptic number.

19798728440280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19798728440280 is an abundant number, since it is smaller than the sum of its proper divisors (39624200672520).

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

19798728440280 is a wasteful number, since it uses less digits than its factorization.

19798728440280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74288324 (or 74288320 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 69.

The spelling of 19798728440280 in words is "nineteen trillion, seven hundred ninety-eight billion, seven hundred twenty-eight million, four hundred forty thousand, two hundred eighty".