128626215 has 16 divisors (see below), whose sum is σ = 206668800. Its totient is φ = 68311712.

The previous prime is 128626207. The next prime is 128626217. The reversal of 128626215 is 512626821.

It is a cyclic number.

It is not a de Polignac number, because 128626215 - 2³ = 128626207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128626217) 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, 14355 + ... + 21524.

It is an arithmetic number, because the mean of its divisors is an integer number (12916800).

Almost surely, 2^128626215 is an apocalyptic number.

128626215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128626215 is a deficient number, since it is larger than the sum of its proper divisors (78042585).

128626215 is a wasteful number, since it uses less digits than its factorization.

128626215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36126.

The product of its digits is 11520, while the sum is 33.

The square root of 128626215 is about 11341.3497873930. The cubic root of 128626215 is about 504.7889390205.

The spelling of 128626215 in words is "one hundred twenty-eight million, six hundred twenty-six thousand, two hundred fifteen".