1028981601 has 6 divisors (see below), whose sum is σ = 1486306770. Its totient is φ = 685987728.

The previous prime is 1028981587. The next prime is 1028981609. The reversal of 1028981601 is 1061898201.

It can be written as a sum of positive squares in only one way, i.e., 682463376 + 346518225 = 26124^2 + 18615^2 .

It is not a de Polignac number, because 1028981601 - 2⁹ = 1028981089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1028981609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57165636 + ... + 57165653.

It is an arithmetic number, because the mean of its divisors is an integer number (247717795).

Almost surely, 2^1028981601 is an apocalyptic number.

It is an amenable number.

1028981601 is a deficient number, since it is larger than the sum of its proper divisors (457325169).

1028981601 is a wasteful number, since it uses less digits than its factorization.

1028981601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114331295 (or 114331292 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1028981601 is about 32077.7430783402. The cubic root of 1028981601 is about 1009.5686819571.

The spelling of 1028981601 in words is "one billion, twenty-eight million, nine hundred eighty-one thousand, six hundred one".