19797288 has 32 divisors (see below), whose sum is σ = 56564160. Its totient is φ = 5656320.

The previous prime is 19797269. The next prime is 19797347. The reversal of 19797288 is 88279791.

It is a super-4 number, since 4×19797288⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 19797288.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58753 + ... + 59088.

It is an arithmetic number, because the mean of its divisors is an integer number (1767630).

Almost surely, 2^19797288 is an apocalyptic number.

It is an amenable number.

19797288 is an abundant number, since it is smaller than the sum of its proper divisors (36766872).

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

19797288 is a wasteful number, since it uses less digits than its factorization.

19797288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117857 (or 117853 counting only the distinct ones).

The product of its digits is 508032, while the sum is 51.

The square root of 19797288 is about 4449.4143434839. The cubic root of 19797288 is about 270.5215706857.

The spelling of 19797288 in words is "nineteen million, seven hundred ninety-seven thousand, two hundred eighty-eight".