609821340 has 48 divisors (see below), whose sum is σ = 1797371520. Its totient is φ = 154059840.

The previous prime is 609821327. The next prime is 609821357. The reversal of 609821340 is 43128906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266326 + ... + 268605.

It is an arithmetic number, because the mean of its divisors is an integer number (37445240).

Almost surely, 2^609821340 is an apocalyptic number.

609821340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

609821340 is an abundant number, since it is smaller than the sum of its proper divisors (1187550180).

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

609821340 is a wasteful number, since it uses less digits than its factorization.

609821340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534962 (or 534960 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 609821340 is about 24694.5609396077. The cubic root of 609821340 is about 848.0098028266.

The spelling of 609821340 in words is "six hundred nine million, eight hundred twenty-one thousand, three hundred forty".