1222748838 has 64 divisors (see below), whose sum is σ = 2881440000. Its totient is φ = 383268672.

The previous prime is 1222748833. The next prime is 1222748869. The reversal of 1222748838 is 8388472221.

It is a super-2 number, since 2×1222748838² = 2990229441660700488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222748793 and 1222748802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222748833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136213 + ... + 144911.

It is an arithmetic number, because the mean of its divisors is an integer number (45022500).

Almost surely, 2^1222748838 is an apocalyptic number.

1222748838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222748838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440720000).

1222748838 is an abundant number, since it is smaller than the sum of its proper divisors (1658691162).

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

1222748838 is a wasteful number, since it uses less digits than its factorization.

1222748838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8866 (or 8860 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 1222748838 is about 34967.8257545418. The cubic root of 1222748838 is about 1069.3316459664.

The spelling of 1222748838 in words is "one billion, two hundred twenty-two million, seven hundred forty-eight thousand, eight hundred thirty-eight".