19799240 has 32 divisors (see below), whose sum is σ = 44885880. Its totient is φ = 7859712.

The previous prime is 19799239. The next prime is 19799243. The reversal of 19799240 is 4299791.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9597604 + 10201636 = 3098^2 + 3194^2 .

It is not an unprimeable number, because it can be changed into a prime (19799243) 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 7 ways as a sum of consecutive naturals, for example, 3674 + ... + 7286.

Almost surely, 2^19799240 is an apocalyptic number.

19799240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19799240 is an abundant number, since it is smaller than the sum of its proper divisors (25086640).

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

19799240 is a wasteful number, since it uses less digits than its factorization.

19799240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761 (or 3757 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 19799240 is about 4449.6336927887. The cubic root of 19799240 is about 270.5304614784.

The spelling of 19799240 in words is "nineteen million, seven hundred ninety-nine thousand, two hundred forty".