1609409872 has 40 divisors (see below), whose sum is σ = 3630946176. Its totient is φ = 676730496.

The previous prime is 1609409849. The next prime is 1609409911. The reversal of 1609409872 is 2789049061.

It is a congruent number.

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, 129628 + ... + 141499.

Almost surely, 2^1609409872 is an apocalyptic number.

It is an amenable number.

1609409872 is an abundant number, since it is smaller than the sum of its proper divisors (2021536304).

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

1609409872 is a wasteful number, since it uses less digits than its factorization.

1609409872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271195 (or 271189 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1609409872 is about 40117.4509658827. The cubic root of 1609409872 is about 1171.8955010169.

The spelling of 1609409872 in words is "one billion, six hundred nine million, four hundred nine thousand, eight hundred seventy-two".