128302990 has 16 divisors (see below), whose sum is σ = 234393552. Its totient is φ = 50554944.

The previous prime is 128302969. The next prime is 128303003. The reversal of 128302990 is 99203821.

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, 95079 + ... + 96418.

It is an arithmetic number, because the mean of its divisors is an integer number (14649597).

Almost surely, 2^128302990 is an apocalyptic number.

128302990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128302990 is a deficient number, since it is larger than the sum of its proper divisors (106090562).

128302990 is a wasteful number, since it uses less digits than its factorization.

128302990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191571.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 128302990 is about 11327.0909769455. The cubic root of 128302990 is about 504.3657560672.

The spelling of 128302990 in words is "one hundred twenty-eight million, three hundred two thousand, nine hundred ninety".