408736489 has 6 divisors (see below), whose sum is σ = 475469034. Its totient is φ = 350345520.

The previous prime is 408736463. The next prime is 408736513. The reversal of 408736489 is 984637804.

It can be written as a sum of positive squares in only one way, i.e., 221265625 + 187470864 = 14875^2 + 13692^2 .

It is a de Polignac number, because none of the positive numbers 2^k-408736489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 8341561 = 408736489 / (4 + 0 + 8 + 7 + 3 + 6 + 4 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408736409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4170732 + ... + 4170829.

It is an arithmetic number, because the mean of its divisors is an integer number (79244839).

Almost surely, 2^408736489 is an apocalyptic number.

408736489 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

408736489 is a deficient number, since it is larger than the sum of its proper divisors (66732545).

408736489 is an equidigital number, since it uses as much as digits as its factorization.

408736489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8341575 (or 8341568 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 408736489 is about 20217.2324762812. The cubic root of 408736489 is about 742.1319630013.

The spelling of 408736489 in words is "four hundred eight million, seven hundred thirty-six thousand, four hundred eighty-nine".