19244989 has 8 divisors (see below), whose sum is σ = 19747800. Its totient is φ = 18747456.

The previous prime is 19244987. The next prime is 19244999. The reversal of 19244989 is 98944291.

It can be written as a sum of positive squares in 4 ways, for example, as 5428900 + 13816089 = 2330^2 + 3717^2 .

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 19244989 - 2¹ = 19244987 is a prime.

It is a super-2 number, since 2×19244989² = 740739203220242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19244983) 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, 6679 + ... + 9115.

It is an arithmetic number, because the mean of its divisors is an integer number (2468475).

Almost surely, 2^19244989 is an apocalyptic number.

It is an amenable number.

19244989 is a deficient number, since it is larger than the sum of its proper divisors (502811).

19244989 is a wasteful number, since it uses less digits than its factorization.

19244989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639.

The product of its digits is 186624, while the sum is 46.

The square root of 19244989 is about 4386.9111000794. The cubic root of 19244989 is about 267.9821635490.

The spelling of 19244989 in words is "nineteen million, two hundred forty-four thousand, nine hundred eighty-nine".