19760720 has 90 divisors (see below), whose sum is σ = 54208026. Its totient is φ = 6679680.

The previous prime is 19760717. The next prime is 19760731. The reversal of 19760720 is 2706791.

It can be written as a sum of positive squares in only one way, i.e., 15808576 + 3952144 = 3976^2 + 1988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 278285 + ... + 278355.

Almost surely, 2^19760720 is an apocalyptic number.

19760720 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 19760720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27104013).

19760720 is an abundant number, since it is smaller than the sum of its proper divisors (34447306).

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

19760720 is an equidigital number, since it uses as much as digits as its factorization.

19760720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 19760720 is about 4445.3031392696. The cubic root of 19760720 is about 270.3549059403.

The spelling of 19760720 in words is "nineteen million, seven hundred sixty thousand, seven hundred twenty".