128287738 has 16 divisors (see below), whose sum is σ = 195451200. Its totient is φ = 63144576.

The previous prime is 128287717. The next prime is 128287739. The reversal of 128287738 is 837782821.

It is a super-3 number, since 3×128287738³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (128287739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36945 + ... + 40267.

It is an arithmetic number, because the mean of its divisors is an integer number (12215700).

Almost surely, 2^128287738 is an apocalyptic number.

128287738 is a deficient number, since it is larger than the sum of its proper divisors (67163462).

128287738 is a wasteful number, since it uses less digits than its factorization.

128287738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621.

The product of its digits is 301056, while the sum is 46.

The square root of 128287738 is about 11326.4177037579. The cubic root of 128287738 is about 504.3457698056.

The spelling of 128287738 in words is "one hundred twenty-eight million, two hundred eighty-seven thousand, seven hundred thirty-eight".