209980460 has 24 divisors (see below), whose sum is σ = 441246960. Its totient is φ = 83937344.

The previous prime is 209980427. The next prime is 209980493. The reversal of 209980460 is 64089902.

It is an interprime number because it is at equal distance from previous prime (209980427) and next prime (209980493).

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, 43907 + ... + 48453.

It is an arithmetic number, because the mean of its divisors is an integer number (18385290).

Almost surely, 2^209980460 is an apocalyptic number.

209980460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209980460 is an abundant number, since it is smaller than the sum of its proper divisors (231266500).

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

209980460 is a wasteful number, since it uses less digits than its factorization.

209980460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6865 (or 6863 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 209980460 is about 14490.7025364542. The cubic root of 209980460 is about 594.3737591116.

The spelling of 209980460 in words is "two hundred nine million, nine hundred eighty thousand, four hundred sixty".