609745128 has 32 divisors (see below), whose sum is σ = 1538354400. Its totient is φ = 201382848.

The previous prime is 609745127. The next prime is 609745159. The reversal of 609745128 is 821547906.

It is a super-2 number, since 2×609745128² = 743578242239472768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 609745128.

It is not an unprimeable number, because it can be changed into a prime (609745121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113926 + ... + 119157.

It is an arithmetic number, because the mean of its divisors is an integer number (48073575).

Almost surely, 2^609745128 is an apocalyptic number.

It is an amenable number.

609745128 is an abundant number, since it is smaller than the sum of its proper divisors (928609272).

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

609745128 is a wasteful number, since it uses less digits than its factorization.

609745128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233201 (or 233197 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 609745128 is about 24693.0177985600. The cubic root of 609745128 is about 847.9744748755.

The spelling of 609745128 in words is "six hundred nine million, seven hundred forty-five thousand, one hundred twenty-eight".