10891849 has 8 divisors (see below), whose sum is σ = 11930760. Its totient is φ = 9897216.

The previous prime is 10891847. The next prime is 10891861. The reversal of 10891849 is 94819801.

It can be written as a sum of positive squares in 4 ways, for example, as 5569600 + 5322249 = 2360^2 + 2307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10891849 - 2¹ = 10891847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10891843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10554 + ... + 11539.

It is an arithmetic number, because the mean of its divisors is an integer number (1491345).

Almost surely, 2^10891849 is an apocalyptic number.

It is an amenable number.

10891849 is a deficient number, since it is larger than the sum of its proper divisors (1038911).

10891849 is a wasteful number, since it uses less digits than its factorization.

10891849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 10891849 is about 3300.2801396245. The cubic root of 10891849 is about 221.6667415405. Note that the first 3 decimals are identical.

It can be divided in two parts, 1089 and 1849, that multiplied together give a square (2013561 = 1419²).

The spelling of 10891849 in words is "ten million, eight hundred ninety-one thousand, eight hundred forty-nine".