408611868 has 96 divisors (see below), whose sum is σ = 1155452928. Its totient is φ = 109900800.

The previous prime is 408611857. The next prime is 408611869. The reversal of 408611868 is 868116804.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408611869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94228 + ... + 98468.

It is an arithmetic number, because the mean of its divisors is an integer number (12035968).

Almost surely, 2^408611868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 408611868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577726464).

408611868 is an abundant number, since it is smaller than the sum of its proper divisors (746841060).

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

408611868 is a wasteful number, since it uses less digits than its factorization.

408611868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323 (or 4321 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 408611868 is about 20214.1501923776. The cubic root of 408611868 is about 742.0565316572.

The spelling of 408611868 in words is "four hundred eight million, six hundred eleven thousand, eight hundred sixty-eight".