128226699 has 24 divisors (see below), whose sum is σ = 201809520. Its totient is φ = 80451072.

The previous prime is 128226673. The next prime is 128226737. The reversal of 128226699 is 996622821.

It is not a de Polignac number, because 128226699 - 2⁵ = 128226667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128226629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 414 + ... + 16019.

It is an arithmetic number, because the mean of its divisors is an integer number (8408730).

Almost surely, 2^128226699 is an apocalyptic number.

128226699 is a deficient number, since it is larger than the sum of its proper divisors (73582821).

128226699 is a wasteful number, since it uses less digits than its factorization.

128226699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16476 (or 16453 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 128226699 is about 11323.7228418926. The cubic root of 128226699 is about 504.2657682777.

The spelling of 128226699 in words is "one hundred twenty-eight million, two hundred twenty-six thousand, six hundred ninety-nine".