10101890 has 16 divisors (see below), whose sum is σ = 18233208. Its totient is φ = 4029696.

The previous prime is 10101887. The next prime is 10101907. The reversal of 10101890 is 9810101.

It can be written as a sum of positive squares in 4 ways, for example, as 5248681 + 4853209 = 2291^2 + 2203^2 .

It is an alternating number because its digits alternate between odd and even.

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, 3164 + ... + 5496.

Almost surely, 2^10101890 is an apocalyptic number.

10101890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10101890 is a deficient number, since it is larger than the sum of its proper divisors (8131318).

10101890 is a wasteful number, since it uses less digits than its factorization.

10101890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 10101890 is about 3178.3470546811. The cubic root of 10101890 is about 216.1727156533.

Adding to 10101890 its reverse (9810101), we get a palindrome (19911991).

The spelling of 10101890 in words is "ten million, one hundred one thousand, eight hundred ninety".