209498622388 has 48 divisors (see below), whose sum is σ = 425215598976. Its totient is φ = 89367724160.

The previous prime is 209498622349. The next prime is 209498622401. The reversal of 209498622388 is 883226894902.

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, 1899331 + ... + 2006602.

It is an arithmetic number, because the mean of its divisors is an integer number (8858658312).

Almost surely, 2^209498622388 is an apocalyptic number.

It is an amenable number.

209498622388 is an abundant number, since it is smaller than the sum of its proper divisors (215716976588).

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

209498622388 is a wasteful number, since it uses less digits than its factorization.

209498622388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906024 (or 3906022 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 61.

The spelling of 209498622388 in words is "two hundred nine billion, four hundred ninety-eight million, six hundred twenty-two thousand, three hundred eighty-eight".