222807640 has 32 divisors (see below), whose sum is σ = 546892560. Its totient is φ = 81020800.

The previous prime is 222807617. The next prime is 222807671. The reversal of 222807640 is 46708222.

222807640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252751 + ... + 253630.

Almost surely, 2^222807640 is an apocalyptic number.

222807640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222807640 is an abundant number, since it is smaller than the sum of its proper divisors (324084920).

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

222807640 is a wasteful number, since it uses less digits than its factorization.

222807640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506403 (or 506399 counting only the distinct ones).

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

The square root of 222807640 is about 14926.7424443513. The cubic root of 222807640 is about 606.2382852450.

The spelling of 222807640 in words is "two hundred twenty-two million, eight hundred seven thousand, six hundred forty".