10861778 has 4 divisors (see below), whose sum is σ = 16292670. Its totient is φ = 5430888.

The previous prime is 10861751. The next prime is 10861801. The reversal of 10861778 is 87716801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87716801 = 673 ⋅130337.

It can be written as a sum of positive squares in only one way, i.e., 7879249 + 2982529 = 2807^2 + 1727^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2715443 + ... + 2715446.

Almost surely, 2^10861778 is an apocalyptic number.

10861778 is a deficient number, since it is larger than the sum of its proper divisors (5430892).

10861778 is an equidigital number, since it uses as much as digits as its factorization.

10861778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5430891.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 10861778 is about 3295.7211653901. The cubic root of 10861778 is about 221.4625556877.

The spelling of 10861778 in words is "ten million, eight hundred sixty-one thousand, seven hundred seventy-eight".