10099978 has 16 divisors (see below), whose sum is σ = 17668800. Its totient is φ = 4328268.

The previous prime is 10099961. The next prime is 10099979. The reversal of 10099978 is 87999001.

It is not an unprimeable number, because it can be changed into a prime (10099979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6676 + ... + 8047.

It is an arithmetic number, because the mean of its divisors is an integer number (1104300).

Almost surely, 2^10099978 is an apocalyptic number.

10099978 is a deficient number, since it is larger than the sum of its proper divisors (7568822).

10099978 is an equidigital number, since it uses as much as digits as its factorization.

10099978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14746 (or 14732 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 10099978 is about 3178.0462551700. The cubic root of 10099978 is about 216.1590763471.

The spelling of 10099978 in words is "ten million, ninety-nine thousand, nine hundred seventy-eight".