128649058 has 16 divisors (see below), whose sum is σ = 197437824. Its totient is φ = 62841520.

The previous prime is 128649043. The next prime is 128649067. The reversal of 128649058 is 850946821.

It is a happy 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, 76341 + ... + 78007.

It is an arithmetic number, because the mean of its divisors is an integer number (12339864).

Almost surely, 2^128649058 is an apocalyptic number.

128649058 is a deficient number, since it is larger than the sum of its proper divisors (68788766).

128649058 is a wasteful number, since it uses less digits than its factorization.

128649058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 128649058 is about 11342.3568097640. The cubic root of 128649058 is about 504.8188194281.

The spelling of 128649058 in words is "one hundred twenty-eight million, six hundred forty-nine thousand, fifty-eight".