868815408 has 40 divisors (see below), whose sum is σ = 2321838000. Its totient is φ = 279618304.

The previous prime is 868815391. The next prime is 868815421. The reversal of 868815408 is 804518868.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 310683 + ... + 313466.

It is an arithmetic number, because the mean of its divisors is an integer number (58045950).

Almost surely, 2^868815408 is an apocalyptic number.

It is an amenable number.

868815408 is an abundant number, since it is smaller than the sum of its proper divisors (1453022592).

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

868815408 is a wasteful number, since it uses less digits than its factorization.

868815408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624189 (or 624183 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 48.

The square root of 868815408 is about 29475.6748523253. The cubic root of 868815408 is about 954.2067947384.

The spelling of 868815408 in words is "eight hundred sixty-eight million, eight hundred fifteen thousand, four hundred eight".