1026940681 has 16 divisors (see below), whose sum is σ = 1114283520. Its totient is φ = 940824000.

The previous prime is 1026940609. The next prime is 1026940703. The reversal of 1026940681 is 1860496201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1026940681 - 2⁹ = 1026940169 is a prime.

It is a super-2 number, since 2×1026940681² = 2109214324585487522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1026940681.

It is not an unprimeable number, because it can be changed into a prime (1026940181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367056 + ... + 1367806.

It is an arithmetic number, because the mean of its divisors is an integer number (69642720).

Almost surely, 2^1026940681 is an apocalyptic number.

It is an amenable number.

1026940681 is a deficient number, since it is larger than the sum of its proper divisors (87342839).

1026940681 is a wasteful number, since it uses less digits than its factorization.

1026940681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1026940681 is about 32045.9151999128. The cubic root of 1026940681 is about 1008.9007682736.

The spelling of 1026940681 in words is "one billion, twenty-six million, nine hundred forty thousand, six hundred eighty-one".