408400878 has 8 divisors (see below), whose sum is σ = 816801768. Its totient is φ = 136133624.

The previous prime is 408400841. The next prime is 408400957. The reversal of 408400878 is 878004804.

It is a sphenic number, since it is the product of 3 distinct primes.

408400878 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34033401 + ... + 34033412.

It is an arithmetic number, because the mean of its divisors is an integer number (102100221).

Almost surely, 2^408400878 is an apocalyptic number.

408400878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

408400878 is a wasteful number, since it uses less digits than its factorization.

408400878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68066818.

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 408400878 is about 20208.9306495915. The cubic root of 408400878 is about 741.9287873961.

The spelling of 408400878 in words is "four hundred eight million, four hundred thousand, eight hundred seventy-eight".