10128855 has 64 divisors (see below), whose sum is σ = 19657728. Its totient is φ = 4392960.

The previous prime is 10128841. The next prime is 10128869. The reversal of 10128855 is 55882101.

10128855 = 668² + 669² + ... + 689².

It is an interprime number because it is at equal distance from previous prime (10128841) and next prime (10128869).

It is not a de Polignac number, because 10128855 - 2¹¹ = 10126807 is a prime.

It is a super-2 number, since 2×10128855² = 205187407222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 64437 + ... + 64593.

It is an arithmetic number, because the mean of its divisors is an integer number (307152).

Almost surely, 2^10128855 is an apocalyptic number.

10128855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10128855 is a deficient number, since it is larger than the sum of its proper divisors (9528873).

10128855 is a wasteful number, since it uses less digits than its factorization.

10128855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 10128855 is about 3182.5862125008. The cubic root of 10128855 is about 216.3648882208.

The spelling of 10128855 in words is "ten million, one hundred twenty-eight thousand, eight hundred fifty-five".