408740849 has 16 divisors (see below), whose sum is σ = 464546880. Its totient is φ = 356352000.

The previous prime is 408740837. The next prime is 408740867. The reversal of 408740849 is 948047804.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408740849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408740869) 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, 18929 + ... + 34289.

It is an arithmetic number, because the mean of its divisors is an integer number (29034180).

Almost surely, 2^408740849 is an apocalyptic number.

It is an amenable number.

408740849 is a deficient number, since it is larger than the sum of its proper divisors (55806031).

408740849 is a wasteful number, since it uses less digits than its factorization.

408740849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15472.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 408740849 is about 20217.3403047978. The cubic root of 408740849 is about 742.1346017706.

The spelling of 408740849 in words is "four hundred eight million, seven hundred forty thousand, eight hundred forty-nine".