890604649 has 9 divisors (see below), whose sum is σ = 979290039. Its totient is φ = 809342160.

The previous prime is 890604629. The next prime is 890604677. The reversal of 890604649 is 946406098.

The square root of 890604649 is 29843.

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

It can be written as a sum of positive squares in only one way, i.e., 878826025 + 11778624 = 29645^2 + 3432^2 .

It is not a de Polignac number, because 890604649 - 2¹⁵ = 890571881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 890604599 and 890604608.

It is not an unprimeable number, because it can be changed into a prime (890604629) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 326917 + ... + 329629.

Almost surely, 2^890604649 is an apocalyptic number.

890604649 is the 29843-rd square number.

890604649 is the 14922-nd centered octagonal number.

It is an amenable number.

890604649 is a deficient number, since it is larger than the sum of its proper divisors (88685390).

890604649 is an frugal number, since it uses more digits than its factorization.

890604649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5448 (or 2724 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The cubic root of 890604649 is about 962.1179544970.

The spelling of 890604649 in words is "eight hundred ninety million, six hundred four thousand, six hundred forty-nine".