222870640 has 40 divisors (see below), whose sum is σ = 523323648. Its totient is φ = 88262400.

The previous prime is 222870619. The next prime is 222870673. The reversal of 222870640 is 46078222.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5712 + ... + 21871.

Almost surely, 2^222870640 is an apocalyptic number.

222870640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222870640 is an abundant number, since it is smaller than the sum of its proper divisors (300453008).

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

222870640 is a wasteful number, since it uses less digits than its factorization.

222870640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27697 (or 27691 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 222870640 is about 14928.8526015900. The cubic root of 222870640 is about 606.2954188525.

The spelling of 222870640 in words is "two hundred twenty-two million, eight hundred seventy thousand, six hundred forty".