217054628 has 48 divisors (see below), whose sum is σ = 447068160. Its totient is φ = 90287904.

The previous prime is 217054627. The next prime is 217054661. The reversal of 217054628 is 826450712.

It is a super-2 number, since 2×217054628² = 94225423072436768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (217054627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136325 + ... + 137907.

It is an arithmetic number, because the mean of its divisors is an integer number (9313920).

Almost surely, 2^217054628 is an apocalyptic number.

217054628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

217054628 is an abundant number, since it is smaller than the sum of its proper divisors (230013532).

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

217054628 is a wasteful number, since it uses less digits than its factorization.

217054628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736 (or 1734 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 217054628 is about 14732.7739411151. The cubic root of 217054628 is about 600.9749224265.

The spelling of 217054628 in words is "two hundred seventeen million, fifty-four thousand, six hundred twenty-eight".