128073656 has 16 divisors (see below), whose sum is σ = 242517240. Its totient is φ = 63402400.

The previous prime is 128073643. The next prime is 128073667. The reversal of 128073656 is 656370821.

It is a super-2 number, since 2×128073656² = 32805722722412672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78446 + ... + 80061.

Almost surely, 2^128073656 is an apocalyptic number.

It is an amenable number.

128073656 is a deficient number, since it is larger than the sum of its proper divisors (114443584).

128073656 is a wasteful number, since it uses less digits than its factorization.

128073656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158614 (or 158610 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 128073656 is about 11316.9631969005. The cubic root of 128073656 is about 504.0650688644.

The spelling of 128073656 in words is "one hundred twenty-eight million, seventy-three thousand, six hundred fifty-six".