1609091420 has 12 divisors (see below), whose sum is σ = 3379092024. Its totient is φ = 643636560.

The previous prime is 1609091381. The next prime is 1609091423. The reversal of 1609091420 is 241909061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609091423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40227266 + ... + 40227305.

It is an arithmetic number, because the mean of its divisors is an integer number (281591002).

Almost surely, 2^1609091420 is an apocalyptic number.

1609091420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1609091420 is an abundant number, since it is smaller than the sum of its proper divisors (1770000604).

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

1609091420 is a wasteful number, since it uses less digits than its factorization.

1609091420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80454580 (or 80454578 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1609091420 is about 40113.4817735883. The cubic root of 1609091420 is about 1171.8182020661.

The spelling of 1609091420 in words is "one billion, six hundred nine million, ninety-one thousand, four hundred twenty".