509342478 has 32 divisors (see below), whose sum is σ = 1041970176. Its totient is φ = 165911328.

The previous prime is 509342473. The next prime is 509342539. The reversal of 509342478 is 874243905.

It is a super-3 number, since 3×509342478³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509342473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284775 + ... + 286557.

It is an arithmetic number, because the mean of its divisors is an integer number (32561568).

Almost surely, 2^509342478 is an apocalyptic number.

509342478 is an abundant number, since it is smaller than the sum of its proper divisors (532627698).

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

509342478 is a wasteful number, since it uses less digits than its factorization.

509342478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 509342478 is about 22568.6171042889. The cubic root of 509342478 is about 798.6134722727.

The spelling of 509342478 in words is "five hundred nine million, three hundred forty-two thousand, four hundred seventy-eight".