10199778 has 16 divisors (see below), whose sum is σ = 20515680. Its totient is φ = 3380576.

The previous prime is 10199767. The next prime is 10199801. The reversal of 10199778 is 87799101.

It is a happy number.

10199778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3675 + ... + 5822.

It is an arithmetic number, because the mean of its divisors is an integer number (1282230).

Almost surely, 2^10199778 is an apocalyptic number.

10199778 is an abundant number, since it is smaller than the sum of its proper divisors (10315902).

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

10199778 is a wasteful number, since it uses less digits than its factorization.

10199778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9681.

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 10199778 is about 3193.7091288970. The cubic root of 10199778 is about 216.8687151409.

The spelling of 10199778 in words is "ten million, one hundred ninety-nine thousand, seven hundred seventy-eight".