128977375 has 32 divisors (see below), whose sum is σ = 167880960. Its totient is φ = 98841600.

The previous prime is 128977361. The next prime is 128977403. The reversal of 128977375 is 573779821.

It is a happy number.

It is not a de Polignac number, because 128977375 - 2¹⁷ = 128846303 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365199 + ... + 365551.

It is an arithmetic number, because the mean of its divisors is an integer number (5246280).

Almost surely, 2^128977375 is an apocalyptic number.

128977375 is a deficient number, since it is larger than the sum of its proper divisors (38903585).

128977375 is an equidigital number, since it uses as much as digits as its factorization.

128977375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 474 counting only the distinct ones).

The product of its digits is 740880, while the sum is 49.

The square root of 128977375 is about 11356.8206378370. The cubic root of 128977375 is about 505.2478931954.

The spelling of 128977375 in words is "one hundred twenty-eight million, nine hundred seventy-seven thousand, three hundred seventy-five".