209089482840 has 640 divisors, whose sum is σ = 851958328320. Its totient is φ = 44957721600.

The previous prime is 209089482827. The next prime is 209089482869. The reversal of 209089482840 is 48284980902.

209089482840 is a `hidden beast` number, since 2 + 0 + 9 + 0 + 89 + 482 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 31816755 + ... + 31823325.

It is an arithmetic number, because the mean of its divisors is an integer number (1331184888).

Almost surely, 2^209089482840 is an apocalyptic number.

209089482840 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 209089482840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425979164160).

209089482840 is an abundant number, since it is smaller than the sum of its proper divisors (642868845480).

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

209089482840 is a wasteful number, since it uses less digits than its factorization.

209089482840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685 (or 6672 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 209089482840 in words is "two hundred nine billion, eighty-nine million, four hundred eighty-two thousand, eight hundred forty".