408445680 has 40 divisors (see below), whose sum is σ = 1266182352. Its totient is φ = 108918784.

The previous prime is 408445673. The next prime is 408445699. The reversal of 408445680 is 86544804.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 850689 + ... + 851168.

Almost surely, 2^408445680 is an apocalyptic number.

408445680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

408445680 is an abundant number, since it is smaller than the sum of its proper divisors (857736672).

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

408445680 is a wasteful number, since it uses less digits than its factorization.

408445680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701873 (or 1701867 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 408445680 is about 20210.0390895218. The cubic root of 408445680 is about 741.9559165233.

The spelling of 408445680 in words is "four hundred eight million, four hundred forty-five thousand, six hundred eighty".