784920489 has 16 divisors (see below), whose sum is σ = 1066419840. Its totient is φ = 513394560.

The previous prime is 784920463. The next prime is 784920503. The reversal of 784920489 is 984029487.

It is not a de Polignac number, because 784920489 - 2⁷ = 784920361 is a prime.

It is a super-2 number, since 2×784920489² = 1232200348103998242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (784920439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69604 + ... + 80090.

It is an arithmetic number, because the mean of its divisors is an integer number (66651240).

Almost surely, 2^784920489 is an apocalyptic number.

It is an amenable number.

784920489 is a deficient number, since it is larger than the sum of its proper divisors (281499351).

784920489 is a wasteful number, since it uses less digits than its factorization.

784920489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10960.

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 784920489 is about 28016.4324816705. The cubic root of 784920489 is about 922.4479893709.

The spelling of 784920489 in words is "seven hundred eighty-four million, nine hundred twenty thousand, four hundred eighty-nine".