128690321390 has 128 divisors (see below), whose sum is σ = 256385433600. Its totient is φ = 46322565120.

The previous prime is 128690321329. The next prime is 128690321393. The reversal of 128690321390 is 93123096821.

It is a super-2 number, since 2×128690321390² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128690321393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 89804114 + ... + 89805546.

It is an arithmetic number, because the mean of its divisors is an integer number (2003011200).

Almost surely, 2^128690321390 is an apocalyptic number.

128690321390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128690321390 is a deficient number, since it is larger than the sum of its proper divisors (127695112210).

128690321390 is a wasteful number, since it uses less digits than its factorization.

128690321390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 128690321390 in words is "one hundred twenty-eight billion, six hundred ninety million, three hundred twenty-one thousand, three hundred ninety".