10243778 has 4 divisors (see below), whose sum is σ = 15365670. Its totient is φ = 5121888.

The previous prime is 10243771. The next prime is 10243799. The reversal of 10243778 is 87734201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87734201 = 1997 ⋅43933.

It can be written as a sum of positive squares in only one way, i.e., 5987809 + 4255969 = 2447^2 + 2063^2 .

It is not an unprimeable number, because it can be changed into a prime (10243771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560943 + ... + 2560946.

Almost surely, 2^10243778 is an apocalyptic number.

10243778 is a deficient number, since it is larger than the sum of its proper divisors (5121892).

10243778 is an equidigital number, since it uses as much as digits as its factorization.

10243778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121891.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 10243778 is about 3200.5902580618. The cubic root of 10243778 is about 217.1801119547.

Adding to 10243778 its reverse (87734201), we get a palindrome (97977979).

The spelling of 10243778 in words is "ten million, two hundred forty-three thousand, seven hundred seventy-eight".