128886733 has 4 divisors (see below), whose sum is σ = 134490528. Its totient is φ = 123282940.

The previous prime is 128886731. The next prime is 128886757. The reversal of 128886733 is 337688821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 337688821 = 1489 ⋅226789.

It is a cyclic number.

It is not a de Polignac number, because 128886733 - 2¹ = 128886731 is a prime.

It is a super-2 number, since 2×128886733² = 33223579886826578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128886731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2801863 + ... + 2801908.

It is an arithmetic number, because the mean of its divisors is an integer number (33622632).

Almost surely, 2^128886733 is an apocalyptic number.

It is an amenable number.

128886733 is a deficient number, since it is larger than the sum of its proper divisors (5603795).

128886733 is an equidigital number, since it uses as much as digits as its factorization.

128886733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5603794.

The product of its digits is 387072, while the sum is 46.

The square root of 128886733 is about 11352.8292949379. The cubic root of 128886733 is about 505.1295070263.

The spelling of 128886733 in words is "one hundred twenty-eight million, eight hundred eighty-six thousand, seven hundred thirty-three".