408216998 has 8 divisors (see below), whose sum is σ = 699800592. Its totient is φ = 174950136.

The previous prime is 408216973. The next prime is 408217097. The reversal of 408216998 is 899612804.

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

It is a super-2 number, since 2×408216998² = 333282234912264008, which contains 22 as substring.

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, 14579165 + ... + 14579192.

It is an arithmetic number, because the mean of its divisors is an integer number (87475074).

Almost surely, 2^408216998 is an apocalyptic number.

408216998 is a deficient number, since it is larger than the sum of its proper divisors (291583594).

408216998 is a wasteful number, since it uses less digits than its factorization.

408216998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29158366.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 408216998 is about 20204.3806636086. The cubic root of 408216998 is about 741.8174210459.

The spelling of 408216998 in words is "four hundred eight million, two hundred sixteen thousand, nine hundred ninety-eight".