209868480 has 84 divisors (see below), whose sum is σ = 721870032. Its totient is φ = 55964160.

The previous prime is 209868443. The next prime is 209868511. The reversal of 209868480 is 84868902.

It is a happy number.

209868480 is a `hidden beast` number, since 20 + 98 + 68 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33556 + ... + 39315.

Almost surely, 2^209868480 is an apocalyptic number.

209868480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209868480 is an abundant number, since it is smaller than the sum of its proper divisors (512001552).

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

209868480 is a wasteful number, since it uses less digits than its factorization.

209868480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72894 (or 72881 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 209868480 is about 14486.8381643477. The cubic root of 209868480 is about 594.2680829159.

The spelling of 209868480 in words is "two hundred nine million, eight hundred sixty-eight thousand, four hundred eighty".