128764437 has 16 divisors (see below), whose sum is σ = 178429440. Its totient is φ = 82498752.

The previous prime is 128764429. The next prime is 128764469. The reversal of 128764437 is 734467821.

It is not a de Polignac number, because 128764437 - 2³ = 128764429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128764487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16083 + ... + 22719.

It is an arithmetic number, because the mean of its divisors is an integer number (11151840).

Almost surely, 2^128764437 is an apocalyptic number.

It is an amenable number.

128764437 is a deficient number, since it is larger than the sum of its proper divisors (49665003).

128764437 is a wasteful number, since it uses less digits than its factorization.

128764437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6892.

The product of its digits is 225792, while the sum is 42.

The square root of 128764437 is about 11347.4418703072. The cubic root of 128764437 is about 504.9696900411.

The spelling of 128764437 in words is "one hundred twenty-eight million, seven hundred sixty-four thousand, four hundred thirty-seven".