128355670 has 8 divisors (see below), whose sum is σ = 231040224. Its totient is φ = 51342264.

The previous prime is 128355649. The next prime is 128355691. The reversal of 128355670 is 76553821.

It is an interprime number because it is at equal distance from previous prime (128355649) and next prime (128355691).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×128355670² = 32950356042297800, 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, 6417774 + ... + 6417793.

It is an arithmetic number, because the mean of its divisors is an integer number (28880028).

Almost surely, 2^128355670 is an apocalyptic number.

128355670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128355670 is a deficient number, since it is larger than the sum of its proper divisors (102684554).

128355670 is a wasteful number, since it uses less digits than its factorization.

128355670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12835574.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 128355670 is about 11329.4161367654. The cubic root of 128355670 is about 504.4347758991.

It can be divided in two parts, 1283 and 55670, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 128355670 in words is "one hundred twenty-eight million, three hundred fifty-five thousand, six hundred seventy".