408820844 has 24 divisors (see below), whose sum is σ = 737556288. Its totient is φ = 198132480.

The previous prime is 408820757. The next prime is 408820861. The reversal of 408820844 is 448028804.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 408820798 and 408820807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35012 + ... + 45204.

It is an arithmetic number, because the mean of its divisors is an integer number (30731512).

Almost surely, 2^408820844 is an apocalyptic number.

It is an amenable number.

408820844 is a deficient number, since it is larger than the sum of its proper divisors (328735444).

408820844 is a wasteful number, since it uses less digits than its factorization.

408820844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505 (or 10503 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 38.

The square root of 408820844 is about 20219.3185839682. The cubic root of 408820844 is about 742.1830131990.

The spelling of 408820844 in words is "four hundred eight million, eight hundred twenty thousand, eight hundred forty-four".