128364615 has 32 divisors (see below), whose sum is σ = 230031360. Its totient is φ = 67912992.

The previous prime is 128364601. The next prime is 128364623. The reversal of 128364615 is 516463821.

It is a happy number.

128364615 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 646 + 1 + 5 = 666.

It is not a de Polignac number, because 128364615 - 2¹¹ = 128362567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128364615.

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, 13402 + ... + 20888.

It is an arithmetic number, because the mean of its divisors is an integer number (7188480).

Almost surely, 2^128364615 is an apocalyptic number.

128364615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128364615 is a deficient number, since it is larger than the sum of its proper divisors (101666745).

128364615 is a wasteful number, since it uses less digits than its factorization.

128364615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628 (or 7622 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 128364615 is about 11329.8108986867. The cubic root of 128364615 is about 504.4464935070.

The spelling of 128364615 in words is "one hundred twenty-eight million, three hundred sixty-four thousand, six hundred fifteen".