770000128 has 18 divisors (see below), whose sum is σ = 1536992954. Its totient is φ = 384999936.

The previous prime is 770000051. The next prime is 770000129. The reversal of 770000128 is 821000077.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 738100224 + 31899904 = 27168^2 + 5648^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770000129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1503651 + ... + 1504162.

Almost surely, 2^770000128 is an apocalyptic number.

It is an amenable number.

770000128 is a deficient number, since it is larger than the sum of its proper divisors (766992826).

770000128 is an equidigital number, since it uses as much as digits as its factorization.

770000128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007829 (or 3007815 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 770000128 is about 27748.8761574230. The cubic root of 770000128 is about 916.5656962211.

The spelling of 770000128 in words is "seven hundred seventy million, one hundred twenty-eight", and thus it is an aban number.