609978816 has 224 divisors, whose sum is σ = 1892198400. Its totient is φ = 192430080.

The previous prime is 609978773. The next prime is 609978823. The reversal of 609978816 is 618879906.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 3160416 + ... + 3160608.

Almost surely, 2^609978816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 609978816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946099200).

609978816 is an abundant number, since it is smaller than the sum of its proper divisors (1282219584).

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

609978816 is a wasteful number, since it uses less digits than its factorization.

609978816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 609978816 is about 24697.7492091891. The cubic root of 609978816 is about 848.0827912522.

The spelling of 609978816 in words is "six hundred nine million, nine hundred seventy-eight thousand, eight hundred sixteen".