1220850456 has 64 divisors (see below), whose sum is σ = 3497825280. Its totient is φ = 347846400.

The previous prime is 1220850353. The next prime is 1220850493. The reversal of 1220850456 is 6540580221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51756 + ... + 71556.

It is an arithmetic number, because the mean of its divisors is an integer number (54653520).

Almost surely, 2^1220850456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220850456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748912640).

1220850456 is an abundant number, since it is smaller than the sum of its proper divisors (2276974824).

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

1220850456 is a wasteful number, since it uses less digits than its factorization.

1220850456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20184 (or 20180 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 1220850456 is about 34940.6705144592. The cubic root of 1220850456 is about 1068.7779614175. Note that the first 3 decimals are identical.

The spelling of 1220850456 in words is "one billion, two hundred twenty million, eight hundred fifty thousand, four hundred fifty-six".