509745338 has 16 divisors (see below), whose sum is σ = 830826240. Its totient is φ = 233668800.

The previous prime is 509745331. The next prime is 509745371. The reversal of 509745338 is 833547905.

It is a super-2 number, since 2×509745338² = 519680619225468488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (509745331) 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, 215183 + ... + 217538.

It is an arithmetic number, because the mean of its divisors is an integer number (51926640).

Almost surely, 2^509745338 is an apocalyptic number.

509745338 is a deficient number, since it is larger than the sum of its proper divisors (321080902).

509745338 is a wasteful number, since it uses less digits than its factorization.

509745338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432773.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 509745338 is about 22577.5405657924. The cubic root of 509745338 is about 798.8239689107.

The spelling of 509745338 in words is "five hundred nine million, seven hundred forty-five thousand, three hundred thirty-eight".