128771674 has 4 divisors (see below), whose sum is σ = 193157514. Its totient is φ = 64385836.

The previous prime is 128771663. The next prime is 128771677. The reversal of 128771674 is 476177821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127577025 + 1194649 = 11295^2 + 1093^2 .

It is a super-3 number, since 3×128771674³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128771674.

It is not an unprimeable number, because it can be changed into a prime (128771677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32192917 + ... + 32192920.

Almost surely, 2^128771674 is an apocalyptic number.

128771674 is a deficient number, since it is larger than the sum of its proper divisors (64385840).

128771674 is an equidigital number, since it uses as much as digits as its factorization.

128771674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64385839.

The product of its digits is 131712, while the sum is 43.

The square root of 128771674 is about 11347.7607482710. The cubic root of 128771674 is about 504.9791502028.

The spelling of 128771674 in words is "one hundred twenty-eight million, seven hundred seventy-one thousand, six hundred seventy-four".