128387469 has 8 divisors (see below), whose sum is σ = 195638080. Its totient is φ = 73364256.

The previous prime is 128387459. The next prime is 128387527. The reversal of 128387469 is 964783821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128387469 - 2¹¹ = 128385421 is a prime.

It is a super-2 number, since 2×128387469² = 32966684392451922, 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 (128387419) 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, 3056824 + ... + 3056865.

It is an arithmetic number, because the mean of its divisors is an integer number (24454760).

Almost surely, 2^128387469 is an apocalyptic number.

It is an amenable number.

128387469 is a deficient number, since it is larger than the sum of its proper divisors (67250611).

128387469 is an equidigital number, since it uses as much as digits as its factorization.

128387469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6113699.

The product of its digits is 580608, while the sum is 48.

The square root of 128387469 is about 11330.8194319740. The cubic root of 128387469 is about 504.4764289012.

The spelling of 128387469 in words is "one hundred twenty-eight million, three hundred eighty-seven thousand, four hundred sixty-nine".