10013778 has 12 divisors (see below), whose sum is σ = 21696558. Its totient is φ = 3337920.

The previous prime is 10013777. The next prime is 10013789. The reversal of 10013778 is 87731001.

It can be written as a sum of positive squares in only one way, i.e., 5489649 + 4524129 = 2343^2 + 2127^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (10013777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278143 + ... + 278178.

Almost surely, 2^10013778 is an apocalyptic number.

10013778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10013778 is an abundant number, since it is smaller than the sum of its proper divisors (11682780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10013778 is a wasteful number, since it uses less digits than its factorization.

10013778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556329 (or 556326 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 10013778 is about 3164.4554033830. The cubic root of 10013778 is about 215.5423695992.

Adding to 10013778 its reverse (87731001), we get a palindrome (97744779).

The spelling of 10013778 in words is "ten million, thirteen thousand, seven hundred seventy-eight".