1224221780 has 24 divisors (see below), whose sum is σ = 2601843552. Its totient is φ = 483788192.

The previous prime is 1224221767. The next prime is 1224221783. The reversal of 1224221780 is 871224221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224221783) 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, 367082 + ... + 370401.

It is an arithmetic number, because the mean of its divisors is an integer number (108410148).

Almost surely, 2^1224221780 is an apocalyptic number.

1224221780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224221780 is an abundant number, since it is smaller than the sum of its proper divisors (1377621772).

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

1224221780 is a wasteful number, since it uses less digits than its factorization.

1224221780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737575 (or 737573 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 1224221780 is about 34988.8808051930. The cubic root of 1224221780 is about 1069.7608514360.

The spelling of 1224221780 in words is "one billion, two hundred twenty-four million, two hundred twenty-one thousand, seven hundred eighty".