218804740 has 96 divisors (see below), whose sum is σ = 585252864. Its totient is φ = 66725760.

The previous prime is 218804737. The next prime is 218804801. The reversal of 218804740 is 47408812.

It is a junction number, because it is equal to n+sod(n) for n = 218804696 and 218804705.

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, 70869 + ... + 73891.

It is an arithmetic number, because the mean of its divisors is an integer number (6096384).

Almost surely, 2^218804740 is an apocalyptic number.

218804740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218804740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292626432).

218804740 is an abundant number, since it is smaller than the sum of its proper divisors (366448124).

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

218804740 is a wasteful number, since it uses less digits than its factorization.

218804740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 218804740 is about 14792.0498917493. The cubic root of 218804740 is about 602.5858213521.

The spelling of 218804740 in words is "two hundred eighteen million, eight hundred four thousand, seven hundred forty".