222790528 has 64 divisors (see below), whose sum is σ = 469281600. Its totient is φ = 105183232.

The previous prime is 222790511. The next prime is 222790537. The reversal of 222790528 is 825097222.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173826 + ... + 175102.

It is an arithmetic number, because the mean of its divisors is an integer number (7332525).

Almost surely, 2^222790528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222790528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234640800).

222790528 is an abundant number, since it is smaller than the sum of its proper divisors (246491072).

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

222790528 is a wasteful number, since it uses less digits than its factorization.

222790528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 222790528 is about 14926.1692339327. The cubic root of 222790528 is about 606.2227648090. Note that the first 3 decimals are identical.

The spelling of 222790528 in words is "two hundred twenty-two million, seven hundred ninety thousand, five hundred twenty-eight".