209285375040 has 336 divisors, whose sum is σ = 840198707712. Its totient is φ = 46818643968.

The previous prime is 209285375023. The next prime is 209285375071. The reversal of 209285375040 is 40573582902.

209285375040 is a `hidden beast` number, since 2 + 0 + 9 + 28 + 537 + 50 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

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 47 ways as a sum of consecutive naturals, for example, 837082 + ... + 1057958.

It is an arithmetic number, because the mean of its divisors is an integer number (2500591392).

Almost surely, 2^209285375040 is an apocalyptic number.

209285375040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209285375040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420099353856).

209285375040 is an abundant number, since it is smaller than the sum of its proper divisors (630913332672).

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

209285375040 is a wasteful number, since it uses less digits than its factorization.

209285375040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220954 (or 220941 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 209285375040 in words is "two hundred nine billion, two hundred eighty-five million, three hundred seventy-five thousand, forty".