427758409 has 8 divisors (see below), whose sum is σ = 462643272. Its totient is φ = 393156480.

The previous prime is 427758407. The next prime is 427758427. The reversal of 427758409 is 904857724.

It can be written as a sum of positive squares in 4 ways, for example, as 27878400 + 399880009 = 5280^2 + 19997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 427758409 - 2¹ = 427758407 is a prime.

It is a super-2 number, since 2×427758409² = 365954512940422562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (427758407) 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, 67582 + ... + 73639.

It is an arithmetic number, because the mean of its divisors is an integer number (57830409).

Almost surely, 2^427758409 is an apocalyptic number.

It is an amenable number.

427758409 is a deficient number, since it is larger than the sum of its proper divisors (34884863).

427758409 is a wasteful number, since it uses less digits than its factorization.

427758409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141467.

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 427758409 is about 20682.3211705070. The cubic root of 427758409 is about 753.4703817587.

The spelling of 427758409 in words is "four hundred twenty-seven million, seven hundred fifty-eight thousand, four hundred nine".