128158816 has 24 divisors (see below), whose sum is σ = 252567504. Its totient is φ = 64014720.

The previous prime is 128158813. The next prime is 128158817. The reversal of 128158816 is 618851821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128158813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54301 + ... + 56611.

It is an arithmetic number, because the mean of its divisors is an integer number (10523646).

Almost surely, 2^128158816 is an apocalyptic number.

128158816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128158816 is a deficient number, since it is larger than the sum of its proper divisors (124408688).

128158816 is a wasteful number, since it uses less digits than its factorization.

128158816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054 (or 4046 counting only the distinct ones).

The product of its digits is 30720, while the sum is 40.

The square root of 128158816 is about 11320.7250651184. The cubic root of 128158816 is about 504.1767667520.

The spelling of 128158816 in words is "one hundred twenty-eight million, one hundred fifty-eight thousand, eight hundred sixteen".