128651319 has 12 divisors (see below), whose sum is σ = 186467736. Its totient is φ = 85473072.

The previous prime is 128651309. The next prime is 128651321. The reversal of 128651319 is 913156821.

128651319 is a `hidden beast` number, since 128 + 6 + 513 + 19 = 666.

It is not a de Polignac number, because 128651319 - 2⁸ = 128651063 is a prime.

It is a super-2 number, since 2×128651319² = 33102323760879522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128651309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21757 + ... + 27030.

It is an arithmetic number, because the mean of its divisors is an integer number (15538978).

Almost surely, 2^128651319 is an apocalyptic number.

128651319 is a deficient number, since it is larger than the sum of its proper divisors (57816417).

128651319 is a wasteful number, since it uses less digits than its factorization.

128651319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49086 (or 49083 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 128651319 is about 11342.4564799694. The cubic root of 128651319 is about 504.8217767983.

The spelling of 128651319 in words is "one hundred twenty-eight million, six hundred fifty-one thousand, three hundred nineteen".