209784328032 has 48 divisors (see below), whose sum is σ = 550788925680. Its totient is φ = 69914767872.

The previous prime is 209784328021. The next prime is 209784328069. The reversal of 209784328032 is 230823487902.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303858 + ... + 715470.

It is an arithmetic number, because the mean of its divisors is an integer number (11474769285).

Almost surely, 2^209784328032 is an apocalyptic number.

It is an amenable number.

209784328032 is an abundant number, since it is smaller than the sum of its proper divisors (341004597648).

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

209784328032 is a wasteful number, since it uses less digits than its factorization.

209784328032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416935 (or 416927 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 209784328032 in words is "two hundred nine billion, seven hundred eighty-four million, three hundred twenty-eight thousand, thirty-two".