1028698837 has 4 divisors (see below), whose sum is σ = 1038884076. Its totient is φ = 1018513600.

The previous prime is 1028698819. The next prime is 1028698841. The reversal of 1028698837 is 7388968201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 931104196 + 97594641 = 30514^2 + 9879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028698837 - 2⁷ = 1028698709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028698877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5092468 + ... + 5092669.

It is an arithmetic number, because the mean of its divisors is an integer number (259721019).

Almost surely, 2^1028698837 is an apocalyptic number.

It is an amenable number.

1028698837 is a deficient number, since it is larger than the sum of its proper divisors (10185239).

1028698837 is a wasteful number, since it uses less digits than its factorization.

1028698837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185238.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 1028698837 is about 32073.3352958497. The cubic root of 1028698837 is about 1009.4761970408.

The spelling of 1028698837 in words is "one billion, twenty-eight million, six hundred ninety-eight thousand, eight hundred thirty-seven".