128936415 has 16 divisors (see below), whose sum is σ = 218433888. Its totient is φ = 64720896.

The previous prime is 128936393. The next prime is 128936443. The reversal of 128936415 is 514639821.

It is not a de Polignac number, because 128936415 - 2⁵ = 128936383 is a prime.

It is a super-2 number, since 2×128936415² = 33249198226104450, 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 15 ways as a sum of consecutive naturals, for example, 252562 + ... + 253071.

It is an arithmetic number, because the mean of its divisors is an integer number (13652118).

Almost surely, 2^128936415 is an apocalyptic number.

128936415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128936415 is a deficient number, since it is larger than the sum of its proper divisors (89497473).

128936415 is a wasteful number, since it uses less digits than its factorization.

128936415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505658.

The product of its digits is 51840, while the sum is 39.

The square root of 128936415 is about 11355.0171730385. The cubic root of 128936415 is about 505.1944028194.

The spelling of 128936415 in words is "one hundred twenty-eight million, nine hundred thirty-six thousand, four hundred fifteen".