201026890 has 8 divisors (see below), whose sum is σ = 361848420. Its totient is φ = 80410752.

The previous prime is 201026879. The next prime is 201026893. The reversal of 201026890 is 98620102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 190522809 + 10504081 = 13803^2 + 3241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (201026893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10051335 + ... + 10051354.

Almost surely, 2^201026890 is an apocalyptic number.

201026890 is a deficient number, since it is larger than the sum of its proper divisors (160821530).

201026890 is a wasteful number, since it uses less digits than its factorization.

201026890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20102696.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 201026890 is about 14178.3951842231. The cubic root of 201026890 is about 585.8027210452.

Adding to 201026890 its reverse (98620102), we get a palindrome (299646992).

It can be divided in two parts, 2010 and 26890, that added together give a square (28900 = 170²).

The spelling of 201026890 in words is "two hundred one million, twenty-six thousand, eight hundred ninety".