128774015 has 8 divisors (see below), whose sum is σ = 154600368. Its totient is φ = 102971520.

The previous prime is 128773993. The next prime is 128774021. The reversal of 128774015 is 510477821.

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

It is not a de Polignac number, because 128774015 - 2⁶ = 128773951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9620 + ... + 18710.

It is an arithmetic number, because the mean of its divisors is an integer number (19325046).

Almost surely, 2^128774015 is an apocalyptic number.

128774015 is a deficient number, since it is larger than the sum of its proper divisors (25826353).

128774015 is an equidigital number, since it uses as much as digits as its factorization.

128774015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11929.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 128774015 is about 11347.8638959057. The cubic root of 128774015 is about 504.9822102677.

The spelling of 128774015 in words is "one hundred twenty-eight million, seven hundred seventy-four thousand, fifteen".