222678640 has 40 divisors (see below), whose sum is σ = 540242208. Its totient is φ = 85198080.

The previous prime is 222678583. The next prime is 222678641. The reversal of 222678640 is 46876222.

222678640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 222678640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222678641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58671 + ... + 62350.

Almost surely, 2^222678640 is an apocalyptic number.

222678640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222678640 is an abundant number, since it is smaller than the sum of its proper divisors (317563568).

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

222678640 is a wasteful number, since it uses less digits than its factorization.

222678640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121057 (or 121051 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 222678640 is about 14922.4207151521. The cubic root of 222678640 is about 606.1212637693.

The spelling of 222678640 in words is "two hundred twenty-two million, six hundred seventy-eight thousand, six hundred forty".