890641018 has 4 divisors (see below), whose sum is σ = 1335961530. Its totient is φ = 445320508.

The previous prime is 890641009. The next prime is 890641039. The reversal of 890641018 is 810146098.

It is a happy number.

890641018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810146098 = 2 ⋅405073049.

It can be written as a sum of positive squares in only one way, i.e., 764909649 + 125731369 = 27657^2 + 11213^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222660253 + ... + 222660256.

Almost surely, 2^890641018 is an apocalyptic number.

890641018 is a deficient number, since it is larger than the sum of its proper divisors (445320512).

890641018 is a wasteful number, since it uses less digits than its factorization.

890641018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445320511.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 890641018 is about 29843.6093326528. The cubic root of 890641018 is about 962.1310507651.

The spelling of 890641018 in words is "eight hundred ninety million, six hundred forty-one thousand, eighteen".