19280989 has 8 divisors (see below), whose sum is σ = 23730560. Its totient is φ = 15255216.

The previous prime is 19280971. The next prime is 19280993. The reversal of 19280989 is 98908291.

It is a happy number.

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 19280989 - 2⁹ = 19280477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19280909) 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, 105849 + ... + 106030.

It is an arithmetic number, because the mean of its divisors is an integer number (2966320).

Almost surely, 2^19280989 is an apocalyptic number.

It is an amenable number.

19280989 is a deficient number, since it is larger than the sum of its proper divisors (4449571).

19280989 is a wasteful number, since it uses less digits than its factorization.

19280989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211899.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 19280989 is about 4391.0122978648. The cubic root of 19280989 is about 268.1491567790.

The spelling of 19280989 in words is "nineteen million, two hundred eighty thousand, nine hundred eighty-nine".