890485281 has 63 divisors (see below), whose sum is σ = 1554161011. Its totient is φ = 491302224.

The previous prime is 890485243. The next prime is 890485283. The reversal of 890485281 is 182584098.

It is a happy number.

The square root of 890485281 is 29841.

It is a perfect power (a square), and thus also a powerful number.

890485281 is a `hidden beast` number, since 8 + 90 + 485 + 2 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 466948881 + 423536400 = 21609^2 + 20580^2 .

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 890485281 - 2⁷ = 890485153 is a prime.

It is a super-2 number, since 2×890485281² = 1585928071355297922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (890485283) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 30706375 + ... + 30706403.

Almost surely, 2^890485281 is an apocalyptic number.

890485281 is the 29841-st square number.

890485281 is the 14921-st centered octagonal number.

It is an amenable number.

890485281 is a deficient number, since it is larger than the sum of its proper divisors (663675730).

890485281 is an frugal number, since it uses more digits than its factorization.

890485281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The cubic root of 890485281 is about 962.0749682601.

The spelling of 890485281 in words is "eight hundred ninety million, four hundred eighty-five thousand, two hundred eighty-one".