609859240 has 16 divisors (see below), whose sum is σ = 1372183380. Its totient is φ = 243943680.

The previous prime is 609859231. The next prime is 609859247. The reversal of 609859240 is 42958906.

It can be written as a sum of positive squares in 2 ways, for example, as 565583524 + 44275716 = 23782^2 + 6654^2 .

It is a super-2 number, since 2×609859240² = 743856585226755200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (609859247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7623201 + ... + 7623280.

Almost surely, 2^609859240 is an apocalyptic number.

It is an amenable number.

609859240 is an abundant number, since it is smaller than the sum of its proper divisors (762324140).

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

609859240 is a wasteful number, since it uses less digits than its factorization.

609859240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15246492 (or 15246488 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 609859240 is about 24695.3283031427. The cubic root of 609859240 is about 848.0273702154.

It can be divided in two parts, 60985 and 9240, that added together give a square (70225 = 265²).

The spelling of 609859240 in words is "six hundred nine million, eight hundred fifty-nine thousand, two hundred forty".