209998488 has 64 divisors (see below), whose sum is σ = 631584000. Its totient is φ = 56840832.

The previous prime is 209998471. The next prime is 209998499. The reversal of 209998488 is 884899902.

209998488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×209998488² = 88198729924572288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29703 + ... + 36086.

It is an arithmetic number, because the mean of its divisors is an integer number (9868500).

Almost surely, 2^209998488 is an apocalyptic number.

209998488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

209998488 is an abundant number, since it is smaller than the sum of its proper divisors (421585512).

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

209998488 is a wasteful number, since it uses less digits than its factorization.

209998488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65824 (or 65820 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 209998488 is about 14491.3245771392. The cubic root of 209998488 is about 594.3907687316.

The spelling of 209998488 in words is "two hundred nine million, nine hundred ninety-eight thousand, four hundred eighty-eight".