10861989 has 8 divisors (see below), whose sum is σ = 14556960. Its totient is φ = 7204176.

The previous prime is 10861969. The next prime is 10861993. The reversal of 10861989 is 98916801.

10861989 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 10861989 - 2¹³ = 10853797 is a prime.

It is a super-2 number, since 2×10861989² = 235965610072242, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10861989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10861909) 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, 8599 + ... + 9780.

It is an arithmetic number, because the mean of its divisors is an integer number (1819620).

Almost surely, 2^10861989 is an apocalyptic number.

It is an amenable number.

10861989 is a deficient number, since it is larger than the sum of its proper divisors (3694971).

10861989 is a wasteful number, since it uses less digits than its factorization.

10861989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18579.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 10861989 is about 3295.7531764378. The cubic root of 10861989 is about 221.4639897162.

The spelling of 10861989 in words is "ten million, eight hundred sixty-one thousand, nine hundred eighty-nine".