128242366 has 32 divisors (see below), whose sum is σ = 223027200. Its totient is φ = 54172800.

The previous prime is 128242357. The next prime is 128242391. The reversal of 128242366 is 663242821.

It is a super-2 number, since 2×128242366² = 32892208874555912, 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 15 ways as a sum of consecutive naturals, for example, 532006 + ... + 532246.

It is an arithmetic number, because the mean of its divisors is an integer number (6969600).

Almost surely, 2^128242366 is an apocalyptic number.

128242366 is a deficient number, since it is larger than the sum of its proper divisors (94784834).

128242366 is a wasteful number, since it uses less digits than its factorization.

128242366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its digits is 27648, while the sum is 34.

The square root of 128242366 is about 11324.4145985565. The cubic root of 128242366 is about 504.2863048485.

The spelling of 128242366 in words is "one hundred twenty-eight million, two hundred forty-two thousand, three hundred sixty-six".