609320400 has 240 divisors, whose sum is σ = 2124655680. Its totient is φ = 148377600.

The previous prime is 609320377. The next prime is 609320401. The reversal of 609320400 is 4023906.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609320401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2168260 + ... + 2168540.

It is an arithmetic number, because the mean of its divisors is an integer number (8852732).

Almost surely, 2^609320400 is an apocalyptic number.

609320400 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 609320400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1062327840).

609320400 is an abundant number, since it is smaller than the sum of its proper divisors (1515335280).

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

609320400 is a wasteful number, since it uses less digits than its factorization.

609320400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 609320400 is about 24684.4161365020. The cubic root of 609320400 is about 847.7775389518. Note that the first 3 decimals are identical.

The spelling of 609320400 in words is "six hundred nine million, three hundred twenty thousand, four hundred".