538466220 has 72 divisors (see below), whose sum is σ = 1664194896. Its totient is φ = 140879232.

The previous prime is 538466219. The next prime is 538466221. The reversal of 538466220 is 22664835.

538466220 is a `hidden beast` number, since 538 + 46 + 62 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (538466219) and next prime (538466221).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (538466221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18682 + ... + 37761.

It is an arithmetic number, because the mean of its divisors is an integer number (23113818).

Almost surely, 2^538466220 is an apocalyptic number.

It is an amenable number.

538466220 is an abundant number, since it is smaller than the sum of its proper divisors (1125728676).

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

538466220 is a wasteful number, since it uses less digits than its factorization.

538466220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56511 (or 56506 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 538466220 is about 23204.8749188613. The cubic root of 538466220 is about 813.5535687892.

The spelling of 538466220 in words is "five hundred thirty-eight million, four hundred sixty-six thousand, two hundred twenty".