128552787 has 24 divisors (see below), whose sum is σ = 203231808. Its totient is φ = 77655600.

The previous prime is 128552761. The next prime is 128552791. The reversal of 128552787 is 787255821.

128552787 is a `hidden beast` number, since 1 + 28 + 552 + 78 + 7 = 666.

It is not a de Polignac number, because 128552787 - 2⁷ = 128552659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128552707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30808 + ... + 34730.

It is an arithmetic number, because the mean of its divisors is an integer number (8467992).

Almost surely, 2^128552787 is an apocalyptic number.

128552787 is a deficient number, since it is larger than the sum of its proper divisors (74679021).

128552787 is a wasteful number, since it uses less digits than its factorization.

128552787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271 (or 4268 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 128552787 is about 11338.1121444445. The cubic root of 128552787 is about 504.6928655578.

The spelling of 128552787 in words is "one hundred twenty-eight million, five hundred fifty-two thousand, seven hundred eighty-seven".