209488896 has 88 divisors (see below), whose sum is σ = 620486640. Its totient is φ = 69820416.

The previous prime is 209488879. The next prime is 209488897. The reversal of 209488896 is 698884902.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (209488897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23860 + ... + 31436.

Almost surely, 2^209488896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209488896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310243320).

209488896 is an abundant number, since it is smaller than the sum of its proper divisors (410997744).

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

209488896 is an equidigital number, since it uses as much as digits as its factorization.

209488896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606 (or 7582 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 209488896 is about 14473.7312397322. The cubic root of 209488896 is about 593.9095873001.

The spelling of 209488896 in words is "two hundred nine million, four hundred eighty-eight thousand, eight hundred ninety-six".