297128385906 has 64 divisors (see below), whose sum is σ = 659143204992. Its totient is φ = 88531200000.

The previous prime is 297128385901. The next prime is 297128385913. The reversal of 297128385906 is 609583821792.

It is a super-2 number, since 2×297128385906² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 297128385906.

It is not an unprimeable number, because it can be changed into a prime (297128385901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12795106 + ... + 12818306.

It is an arithmetic number, because the mean of its divisors is an integer number (10299112578).

Almost surely, 2^297128385906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 297128385906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329571602496).

297128385906 is an abundant number, since it is smaller than the sum of its proper divisors (362014819086).

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

297128385906 is a wasteful number, since it uses less digits than its factorization.

297128385906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26459.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 297128385906 in words is "two hundred ninety-seven billion, one hundred twenty-eight million, three hundred eighty-five thousand, nine hundred six".