1222195920 has 80 divisors (see below), whose sum is σ = 4133253312. Its totient is φ = 296289280.

The previous prime is 1222195907. The next prime is 1222195927. The reversal of 1222195920 is 295912221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222195927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228837 + ... + 234116.

Almost surely, 2^1222195920 is an apocalyptic number.

1222195920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222195920 is an abundant number, since it is smaller than the sum of its proper divisors (2911057392).

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

1222195920 is a wasteful number, since it uses less digits than its factorization.

1222195920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462980 (or 462974 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1222195920 is about 34959.9187642077. The cubic root of 1222195920 is about 1069.1704403726.

The spelling of 1222195920 in words is "one billion, two hundred twenty-two million, one hundred ninety-five thousand, nine hundred twenty".