128929288 has 32 divisors (see below), whose sum is σ = 255988800. Its totient is φ = 60706368.

The previous prime is 128929259. The next prime is 128929291. The reversal of 128929288 is 882929821.

It is a happy number.

It is a super-2 number, since 2×128929288² = 33245522608373888, which contains 22 as substring.

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, 23845 + ... + 28747.

It is an arithmetic number, because the mean of its divisors is an integer number (7999650).

Almost surely, 2^128929288 is an apocalyptic number.

It is an amenable number.

128929288 is a deficient number, since it is larger than the sum of its proper divisors (127059512).

128929288 is a wasteful number, since it uses less digits than its factorization.

128929288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101 (or 5097 counting only the distinct ones).

The product of its digits is 331776, while the sum is 49.

The square root of 128929288 is about 11354.7033426682. The cubic root of 128929288 is about 505.1850943893.

The spelling of 128929288 in words is "one hundred twenty-eight million, nine hundred twenty-nine thousand, two hundred eighty-eight".