4890861 has 14 divisors (see below), whose sum is σ = 7334030. Its totient is φ = 3260088.

The previous prime is 4890859. The next prime is 4890869. The reversal of 4890861 is 1680984.

It is a happy number.

4890861 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 4435236 + 455625 = 2106^2 + 675^2 .

It is not a de Polignac number, because 4890861 - 2¹ = 4890859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4890869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2626 + ... + 4083.

Almost surely, 2^4890861 is an apocalyptic number.

It is an amenable number.

4890861 is a deficient number, since it is larger than the sum of its proper divisors (2443169).

4890861 is an frugal number, since it uses more digits than its factorization.

4890861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727 (or 6712 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 4890861 is about 2211.5291090103. The cubic root of 4890861 is about 169.7442636930.

It can be divided in two parts, 48 and 90861, that added together give a palindrome (90909).

The spelling of 4890861 in words is "four million, eight hundred ninety thousand, eight hundred sixty-one".