128690050 has 24 divisors (see below), whose sum is σ = 241492356. Its totient is φ = 51018240.

The previous prime is 128690047. The next prime is 128690063. The reversal of 128690050 is 50096821.

It can be written as a sum of positive squares in 6 ways, for example, as 35200489 + 93489561 = 5933^2 + 9669^2 .

It is a super-2 number, since 2×128690050² = 33122257938005000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128689994 and 128690021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5739 + ... + 17038.

Almost surely, 2^128690050 is an apocalyptic number.

128690050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128690050 is a deficient number, since it is larger than the sum of its proper divisors (112802306).

128690050 is a wasteful number, since it uses less digits than its factorization.

128690050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22902 (or 22897 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 128690050 is about 11344.1636976905. The cubic root of 128690050 is about 504.8724312614.

The spelling of 128690050 in words is "one hundred twenty-eight million, six hundred ninety thousand, fifty".