209782948 has 12 divisors (see below), whose sum is σ = 368697420. Its totient is φ = 104440832.

The previous prime is 209782913. The next prime is 209782961. The reversal of 209782948 is 849287902.

It can be written as a sum of positive squares in 2 ways, for example, as 30008484 + 179774464 = 5478^2 + 13408^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111613 + ... + 113476.

It is an arithmetic number, because the mean of its divisors is an integer number (30724785).

Almost surely, 2^209782948 is an apocalyptic number.

It is an amenable number.

209782948 is a deficient number, since it is larger than the sum of its proper divisors (158914472).

209782948 is a wasteful number, since it uses less digits than its factorization.

209782948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225326 (or 225324 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 209782948 is about 14483.8858045761. The cubic root of 209782948 is about 594.1873405317.

The spelling of 209782948 in words is "two hundred nine million, seven hundred eighty-two thousand, nine hundred forty-eight".