19780752 has 20 divisors (see below), whose sum is σ = 51100400. Its totient is φ = 6593568.

The previous prime is 19780751. The next prime is 19780781. The reversal of 19780752 is 25708791.

It is a self number, because there is not a number n which added to its sum of digits gives 19780752.

It is not an unprimeable number, because it can be changed into a prime (19780751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206002 + ... + 206097.

It is an arithmetic number, because the mean of its divisors is an integer number (2555020).

Almost surely, 2^19780752 is an apocalyptic number.

19780752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19780752 is an abundant number, since it is smaller than the sum of its proper divisors (31319648).

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

19780752 is a wasteful number, since it uses less digits than its factorization.

19780752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412110 (or 412104 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 19780752 is about 4447.5557332090. Note that the first 3 decimals coincide. The cubic root of 19780752 is about 270.4462305558.

The spelling of 19780752 in words is "nineteen million, seven hundred eighty thousand, seven hundred fifty-two".