128670942 has 8 divisors (see below), whose sum is σ = 257341896. Its totient is φ = 42890312.

The previous prime is 128670937. The next prime is 128670959. The reversal of 128670942 is 249076821.

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

128670942 is an admirable number.

It is a super-2 number, since 2×128670942² = 33112422630334728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128670942.

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, 10722573 + ... + 10722584.

It is an arithmetic number, because the mean of its divisors is an integer number (32167737).

Almost surely, 2^128670942 is an apocalyptic number.

128670942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128670942 is a wasteful number, since it uses less digits than its factorization.

128670942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21445162.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 128670942 is about 11343.3214712447. The cubic root of 128670942 is about 504.8474420724.

The spelling of 128670942 in words is "one hundred twenty-eight million, six hundred seventy thousand, nine hundred forty-two".