222162640 has 40 divisors (see below), whose sum is σ = 590319360. Its totient is φ = 76169856.

The previous prime is 222162637. The next prime is 222162653. The reversal of 222162640 is 46261222.

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

It is a super-2 number, since 2×222162640² = 98712477223539200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197800 + ... + 198919.

It is an arithmetic number, because the mean of its divisors is an integer number (14757984).

Almost surely, 2^222162640 is an apocalyptic number.

222162640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222162640 is an abundant number, since it is smaller than the sum of its proper divisors (368156720).

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

222162640 is a wasteful number, since it uses less digits than its factorization.

222162640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396739 (or 396733 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 222162640 is about 14905.1212675375. The cubic root of 222162640 is about 605.6527253970.

The spelling of 222162640 in words is "two hundred twenty-two million, one hundred sixty-two thousand, six hundred forty".