1078861684 has 12 divisors (see below), whose sum is σ = 1999067364. Its totient is φ = 507699584.

The previous prime is 1078861681. The next prime is 1078861687. The reversal of 1078861684 is 4861688701.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1078861681) and next prime (1078861687).

It can be written as a sum of positive squares in 2 ways, for example, as 337824400 + 741037284 = 18380^2 + 27222^2 .

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 3 ways as a sum of consecutive naturals, for example, 7932739 + ... + 7932874.

It is an arithmetic number, because the mean of its divisors is an integer number (166588947).

Almost surely, 2^1078861684 is an apocalyptic number.

It is an amenable number.

1078861684 is a deficient number, since it is larger than the sum of its proper divisors (920205680).

1078861684 is a wasteful number, since it uses less digits than its factorization.

1078861684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15865634 (or 15865632 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 1078861684 is about 32846.0299579721. The cubic root of 1078861684 is about 1025.6249796271.

The spelling of 1078861684 in words is "one billion, seventy-eight million, eight hundred sixty-one thousand, six hundred eighty-four".