210799980 has 36 divisors (see below), whose sum is σ = 639427152. Its totient is φ = 56213280.

The previous prime is 210799943. The next prime is 210799999. The reversal of 210799980 is 89997012.

It is a tau number, because it is divible by the number of its divisors (36).

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, 585376 + ... + 585735.

Almost surely, 2^210799980 is an apocalyptic number.

210799980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210799980 is an abundant number, since it is smaller than the sum of its proper divisors (428627172).

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

210799980 is a wasteful number, since it uses less digits than its factorization.

210799980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171126 (or 1171121 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 210799980 is about 14518.9524415503. The cubic root of 210799980 is about 595.1460037623.

The spelling of 210799980 in words is "two hundred ten million, seven hundred ninety-nine thousand, nine hundred eighty".