409216128 has 32 divisors (see below), whose sum is σ = 1086981360. Its totient is φ = 136405248.

The previous prime is 409216117. The next prime is 409216183. The reversal of 409216128 is 821612904.

It is a tau number, because it is divible by the number of its divisors (32).

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, 532450 + ... + 533217.

Almost surely, 2^409216128 is an apocalyptic number.

409216128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

409216128 is an abundant number, since it is smaller than the sum of its proper divisors (677765232).

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

409216128 is a wasteful number, since it uses less digits than its factorization.

409216128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065684 (or 1065672 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 409216128 is about 20229.0911313386. The cubic root of 409216128 is about 742.4221387819.

The spelling of 409216128 in words is "four hundred nine million, two hundred sixteen thousand, one hundred twenty-eight".