1078861685 has 16 divisors (see below), whose sum is σ = 1432225152. Its totient is φ = 773572800.

The previous prime is 1078861681. The next prime is 1078861687. The reversal of 1078861685 is 5861688701.

It is not a de Polignac number, because 1078861685 - 2² = 1078861681 is a prime.

It is a super-2 number, since 2×1078861685² = 2327885070722078450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078861681) 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, 134234 + ... + 142043.

It is an arithmetic number, because the mean of its divisors is an integer number (89514072).

Almost surely, 2^1078861685 is an apocalyptic number.

It is an amenable number.

1078861685 is a deficient number, since it is larger than the sum of its proper divisors (353363467).

1078861685 is a wasteful number, since it uses less digits than its factorization.

1078861685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276364.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 1078861685 is about 32846.0299731946. The cubic root of 1078861685 is about 1025.6249799440.

It can be divided in two parts, 10788616 and 85, that added together give a palindrome (10788701).

The spelling of 1078861685 in words is "one billion, seventy-eight million, eight hundred sixty-one thousand, six hundred eighty-five".