128540326 has 16 divisors (see below), whose sum is σ = 195874560. Its totient is φ = 63256320.

The previous prime is 128540303. The next prime is 128540327. The reversal of 128540326 is 623045821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128540327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35320 + ... + 38788.

It is an arithmetic number, because the mean of its divisors is an integer number (12242160).

Almost surely, 2^128540326 is an apocalyptic number.

128540326 is a deficient number, since it is larger than the sum of its proper divisors (67334234).

128540326 is a wasteful number, since it uses less digits than its factorization.

128540326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 128540326 is about 11337.5626128370. The cubic root of 128540326 is about 504.6765579093.

The spelling of 128540326 in words is "one hundred twenty-eight million, five hundred forty thousand, three hundred twenty-six".