209791248 has 20 divisors (see below), whose sum is σ = 541960848. Its totient is φ = 69930400.

The previous prime is 209791247. The next prime is 209791259. The reversal of 209791248 is 842197902.

It is not an unprimeable number, because it can be changed into a prime (209791243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2185278 + ... + 2185373.

Almost surely, 2^209791248 is an apocalyptic number.

It is an amenable number.

209791248 is an abundant number, since it is smaller than the sum of its proper divisors (332169600).

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

209791248 is a wasteful number, since it uses less digits than its factorization.

209791248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370662 (or 4370656 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 209791248 is about 14484.1723270610. The cubic root of 209791248 is about 594.1951767102.

The spelling of 209791248 in words is "two hundred nine million, seven hundred ninety-one thousand, two hundred forty-eight".