222742780 has 24 divisors (see below), whose sum is σ = 503741952. Its totient is φ = 82243392.

The previous prime is 222742777. The next prime is 222742813. The reversal of 222742780 is 87247222.

It is a super-2 number, since 2×222742780² = 99228692084256800, which contains 22 as substring.

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, 428092 + ... + 428611.

It is an arithmetic number, because the mean of its divisors is an integer number (20989248).

Almost surely, 2^222742780 is an apocalyptic number.

222742780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222742780 is an abundant number, since it is smaller than the sum of its proper divisors (280999172).

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

222742780 is a wasteful number, since it uses less digits than its factorization.

222742780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856725 (or 856723 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 222742780 is about 14924.5696755384. The cubic root of 222742780 is about 606.1794535831.

The spelling of 222742780 in words is "two hundred twenty-two million, seven hundred forty-two thousand, seven hundred eighty".