5218909858 has 4 divisors (see below), whose sum is σ = 7828364790. Its totient is φ = 2609454928.

The previous prime is 5218909837. The next prime is 5218909879. The reversal of 5218909858 is 8589098125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5218909837) and next prime (5218909879).

It can be written as a sum of positive squares in only one way, i.e., 4159863009 + 1059046849 = 64497^2 + 32543^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 5218909799 and 5218909808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1304727463 + ... + 1304727466.

Almost surely, 2^5218909858 is an apocalyptic number.

5218909858 is a deficient number, since it is larger than the sum of its proper divisors (2609454932).

5218909858 is a wasteful number, since it uses less digits than its factorization.

5218909858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609454931.

The product of its (nonzero) digits is 2073600, while the sum is 55.

The square root of 5218909858 is about 72242.0227983685. The cubic root of 5218909858 is about 1734.5757289622.

The spelling of 5218909858 in words is "five billion, two hundred eighteen million, nine hundred nine thousand, eight hundred fifty-eight".