10000778 has 4 divisors (see below), whose sum is σ = 15001170. Its totient is φ = 5000388.

The previous prime is 10000769. The next prime is 10000789. The reversal of 10000778 is 87700001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87700001 = 53 ⋅1654717.

It can be written as a sum of positive squares in only one way, i.e., 8543929 + 1456849 = 2923^2 + 1207^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500193 + ... + 2500196.

Almost surely, 2^10000778 is an apocalyptic number.

10000778 is a deficient number, since it is larger than the sum of its proper divisors (5000392).

10000778 is an equidigital number, since it uses as much as digits as its factorization.

10000778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000391.

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 10000778 is about 3162.4006703769. The cubic root of 10000778 is about 215.4490560256.

Adding to 10000778 its reverse (87700001), we get a palindrome (97700779).

The spelling of 10000778 in words is "ten million, seven hundred seventy-eight", and thus it is an aban number.