609081984 has 256 divisors, whose sum is σ = 2176761600. Its totient is φ = 163676160.

The previous prime is 609081973. The next prime is 609082003. The reversal of 609081984 is 489180906.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 410524 + ... + 412004.

It is an arithmetic number, because the mean of its divisors is an integer number (8502975).

Almost surely, 2^609081984 is an apocalyptic number.

609081984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609081984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088380800).

609081984 is an abundant number, since it is smaller than the sum of its proper divisors (1567679616).

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

609081984 is a wasteful number, since it uses less digits than its factorization.

609081984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 609081984 is about 24679.5863822715. The cubic root of 609081984 is about 847.6669512118. Note that the first 3 decimals are identical.

The spelling of 609081984 in words is "six hundred nine million, eighty-one thousand, nine hundred eighty-four".