128468978 has 16 divisors (see below), whose sum is σ = 210396096. Its totient is φ = 58346640.

The previous prime is 128468969. The next prime is 128468981. The reversal of 128468978 is 879864821.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50075 + ... + 52577.

It is an arithmetic number, because the mean of its divisors is an integer number (13149756).

Almost surely, 2^128468978 is an apocalyptic number.

128468978 is the 6059-th centered heptagonal number.

128468978 is a deficient number, since it is larger than the sum of its proper divisors (81927118).

128468978 is a wasteful number, since it uses less digits than its factorization.

128468978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4849.

The product of its digits is 1548288, while the sum is 53.

The square root of 128468978 is about 11334.4156443991. The cubic root of 128468978 is about 504.5831648385.

The spelling of 128468978 in words is "one hundred twenty-eight million, four hundred sixty-eight thousand, nine hundred seventy-eight".