5218449894 has 64 divisors (see below), whose sum is σ = 13263022080. Its totient is φ = 1489881600.

The previous prime is 5218449871. The next prime is 5218449917. The reversal of 5218449894 is 4989448125.

It is a happy number.

5218449894 is a `hidden beast` number, since 52 + 18 + 4 + 498 + 94 = 666.

It is an interprime number because it is at equal distance from previous prime (5218449871) and next prime (5218449917).

It is a super-2 number, since 2×5218449894² = 54464438592377222472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 5218449894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600867 + ... + 609489.

It is an arithmetic number, because the mean of its divisors is an integer number (207234720).

Almost surely, 2^5218449894 is an apocalyptic number.

5218449894 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

5218449894 is an abundant number, since it is smaller than the sum of its proper divisors (8044572186).

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

5218449894 is a wasteful number, since it uses less digits than its factorization.

5218449894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10242 (or 10236 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 5218449894 is about 72238.8392348604. The cubic root of 5218449894 is about 1734.5247690330.

The spelling of 5218449894 in words is "five billion, two hundred eighteen million, four hundred forty-nine thousand, eight hundred ninety-four".