1026981798 has 16 divisors (see below), whose sum is σ = 2174785200. Its totient is φ = 322190336.

The previous prime is 1026981797. The next prime is 1026981799. The reversal of 1026981798 is 8971896201.

It is an interprime number because it is at equal distance from previous prime (1026981797) and next prime (1026981799).

It is a super-2 number, since 2×1026981798² = 2109383226846625608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 1026981798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026981797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5034123 + ... + 5034326.

It is an arithmetic number, because the mean of its divisors is an integer number (135924075).

Almost surely, 2^1026981798 is an apocalyptic number.

1026981798 is an abundant number, since it is smaller than the sum of its proper divisors (1147803402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1026981798 is a wasteful number, since it uses less digits than its factorization.

1026981798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10068471.

The product of its (nonzero) digits is 435456, while the sum is 51.

The square root of 1026981798 is about 32046.5567261133. The cubic root of 1026981798 is about 1008.9142329979.

The spelling of 1026981798 in words is "one billion, twenty-six million, nine hundred eighty-one thousand, seven hundred ninety-eight".