10199990 has 16 divisors (see below), whose sum is σ = 18543600. Its totient is φ = 4039200.

The previous prime is 10199977. The next prime is 10199999. The reversal of 10199990 is 9999101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10199999) 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, 4040 + ... + 6059.

It is an arithmetic number, because the mean of its divisors is an integer number (1158975).

Almost surely, 2^10199990 is an apocalyptic number.

10199990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10199990 is a deficient number, since it is larger than the sum of its proper divisors (8343610).

10199990 is a wasteful number, since it uses less digits than its factorization.

10199990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10207.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 10199990 is about 3193.7423189732. The cubic root of 10199990 is about 216.8702176524.

The spelling of 10199990 in words is "ten million, one hundred ninety-nine thousand, nine hundred ninety".