1088389861 has 8 divisors (see below), whose sum is σ = 1241060184. Its totient is φ = 945569280.

The previous prime is 1088389859. The next prime is 1088389903. The reversal of 1088389861 is 1689838801.

It can be written as a sum of positive squares in 4 ways, for example, as 277222500 + 811167361 = 16650^2 + 28481^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1088389861 - 2¹ = 1088389859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1088389799 and 1088389808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088389801) 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, 2462200 + ... + 2462641.

It is an arithmetic number, because the mean of its divisors is an integer number (155132523).

Almost surely, 2^1088389861 is an apocalyptic number.

It is an amenable number.

1088389861 is a deficient number, since it is larger than the sum of its proper divisors (152670323).

1088389861 is a wasteful number, since it uses less digits than its factorization.

1088389861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924871.

The product of its (nonzero) digits is 663552, while the sum is 52.

The square root of 1088389861 is about 32990.7541744653. The cubic root of 1088389861 is about 1028.6354699277.

The spelling of 1088389861 in words is "one billion, eighty-eight million, three hundred eighty-nine thousand, eight hundred sixty-one".