128910742 has 8 divisors (see below), whose sum is σ = 200034000. Its totient is φ = 62232744.

The previous prime is 128910737. The next prime is 128910757. The reversal of 128910742 is 247019821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128910698 and 128910707.

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, 1111242 + ... + 1111357.

It is an arithmetic number, because the mean of its divisors is an integer number (25004250).

Almost surely, 2^128910742 is an apocalyptic number.

128910742 is a deficient number, since it is larger than the sum of its proper divisors (71123258).

128910742 is a wasteful number, since it uses less digits than its factorization.

128910742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222630.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 128910742 is about 11353.8866473116. The cubic root of 128910742 is about 505.1608702268.

The spelling of 128910742 in words is "one hundred twenty-eight million, nine hundred ten thousand, seven hundred forty-two".