128651435 has 24 divisors (see below), whose sum is σ = 170465568. Its totient is φ = 93139200.

The previous prime is 128651431. The next prime is 128651437. The reversal of 128651435 is 534156821.

It is not a de Polignac number, because 128651435 - 2² = 128651431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128651395 and 128651404.

It is not an unprimeable number, because it can be changed into a prime (128651431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203570 + ... + 204200.

It is an arithmetic number, because the mean of its divisors is an integer number (7102732).

Almost surely, 2^128651435 is an apocalyptic number.

128651435 is a deficient number, since it is larger than the sum of its proper divisors (41814133).

128651435 is a wasteful number, since it uses less digits than its factorization.

128651435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 984 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 128651435 is about 11342.4615934990. The cubic root of 128651435 is about 504.8219285244.

The spelling of 128651435 in words is "one hundred twenty-eight million, six hundred fifty-one thousand, four hundred thirty-five".