4891869 has 12 divisors (see below), whose sum is σ = 7481916. Its totient is φ = 3069312.

The previous prime is 4891853. The next prime is 4891879. The reversal of 4891869 is 9681984.

It can be written as a sum of positive squares in 2 ways, for example, as 4347225 + 544644 = 2085^2 + 738^2 .

It is not a de Polignac number, because 4891869 - 2⁴ = 4891853 is a prime.

It is a super-2 number, since 2×4891869² = 47860764626322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15834 + ... + 16139.

It is an arithmetic number, because the mean of its divisors is an integer number (623493).

Almost surely, 2^4891869 is an apocalyptic number.

It is an amenable number.

4891869 is a deficient number, since it is larger than the sum of its proper divisors (2590047).

4891869 is a wasteful number, since it uses less digits than its factorization.

4891869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31996 (or 31993 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 4891869 is about 2211.7569938852. The cubic root of 4891869 is about 169.7559242483.

The spelling of 4891869 in words is "four million, eight hundred ninety-one thousand, eight hundred sixty-nine".