128981948 has 24 divisors (see below), whose sum is σ = 236208000. Its totient is φ = 61551360.

The previous prime is 128981939. The next prime is 128981971. The reversal of 128981948 is 849189821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128981896 and 128981905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1928 + ... + 16176.

It is an arithmetic number, because the mean of its divisors is an integer number (9842000).

Almost surely, 2^128981948 is an apocalyptic number.

It is an amenable number.

128981948 is a deficient number, since it is larger than the sum of its proper divisors (107226052).

128981948 is a wasteful number, since it uses less digits than its factorization.

128981948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14357 (or 14355 counting only the distinct ones).

The product of its digits is 331776, while the sum is 50.

The square root of 128981948 is about 11357.0219688085. The cubic root of 128981948 is about 505.2538644528.

The spelling of 128981948 in words is "one hundred twenty-eight million, nine hundred eighty-one thousand, nine hundred forty-eight".