408420824 has 32 divisors (see below), whose sum is σ = 882094080. Its totient is φ = 173656224.

The previous prime is 408420773. The next prime is 408420829. The reversal of 408420824 is 428024804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408420829) 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, 21602 + ... + 35825.

It is an arithmetic number, because the mean of its divisors is an integer number (27565440).

Almost surely, 2^408420824 is an apocalyptic number.

It is an amenable number.

408420824 is an abundant number, since it is smaller than the sum of its proper divisors (473673256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

408420824 is a wasteful number, since it uses less digits than its factorization.

408420824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57567 (or 57563 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 408420824 is about 20209.4241382579. The cubic root of 408420824 is about 741.9408656191.

The spelling of 408420824 in words is "four hundred eight million, four hundred twenty thousand, eight hundred twenty-four".