609131880 has 256 divisors, whose sum is σ = 2337984000. Its totient is φ = 138184704.

The previous prime is 609131837. The next prime is 609131893. The reversal of 609131880 is 88131906.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1489116 + ... + 1489524.

It is an arithmetic number, because the mean of its divisors is an integer number (9132750).

Almost surely, 2^609131880 is an apocalyptic number.

609131880 is a gapful number since it is divisible by the number (60) 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 609131880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168992000).

609131880 is an abundant number, since it is smaller than the sum of its proper divisors (1728852120).

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

609131880 is a wasteful number, since it uses less digits than its factorization.

609131880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 609131880 is about 24680.5972375062. The cubic root of 609131880 is about 847.6900975405.

The spelling of 609131880 in words is "six hundred nine million, one hundred thirty-one thousand, eight hundred eighty".