128630715 has 16 divisors (see below), whose sum is σ = 205958688. Its totient is φ = 68553216.

The previous prime is 128630713. The next prime is 128630731. The reversal of 128630715 is 517036821.

It is not a de Polignac number, because 128630715 - 2¹ = 128630713 is a prime.

It is a super-2 number, since 2×128630715² = 33091721682822450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128630713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28707 + ... + 32883.

It is an arithmetic number, because the mean of its divisors is an integer number (12872418).

Almost surely, 2^128630715 is an apocalyptic number.

128630715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128630715 is a deficient number, since it is larger than the sum of its proper divisors (77327973).

128630715 is a wasteful number, since it uses less digits than its factorization.

128630715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 128630715 is about 11341.5481747423. The cubic root of 128630715 is about 504.7948256477.

The spelling of 128630715 in words is "one hundred twenty-eight million, six hundred thirty thousand, seven hundred fifteen".