128888950 has 24 divisors (see below), whose sum is σ = 241089480. Its totient is φ = 51264000.

The previous prime is 128888923. The next prime is 128888971. The reversal of 128888950 is 59888821.

It is a happy number.

It is a super-2 number, since 2×128888950² = 33224722864205000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128888894 and 128888903.

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, 1750 + ... + 16150.

It is an arithmetic number, because the mean of its divisors is an integer number (10045395).

Almost surely, 2^128888950 is an apocalyptic number.

128888950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128888950 is a deficient number, since it is larger than the sum of its proper divisors (112200530).

128888950 is a wasteful number, since it uses less digits than its factorization.

128888950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14592 (or 14587 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 49.

The square root of 128888950 is about 11352.9269353766. The cubic root of 128888950 is about 505.1324032791.

It can be divided in two parts, 12888 and 8950, that multiplied together give a square (115347600 = 10740²).

The spelling of 128888950 in words is "one hundred twenty-eight million, eight hundred eighty-eight thousand, nine hundred fifty".