1220458284 has 36 divisors (see below), whose sum is σ = 3086109936. Its totient is φ = 406679328.

The previous prime is 1220458279. The next prime is 1220458297. The reversal of 1220458284 is 4828540221.

1220458284 is a `hidden beast` number, since 122 + 0 + 458 + 2 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191737 + ... + 197999.

It is an arithmetic number, because the mean of its divisors is an integer number (85725276).

Almost surely, 2^1220458284 is an apocalyptic number.

It is an amenable number.

1220458284 is an abundant number, since it is smaller than the sum of its proper divisors (1865651652).

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

1220458284 is a wasteful number, since it uses less digits than its factorization.

1220458284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11686 (or 11681 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 1220458284 is about 34935.0580935541. The cubic root of 1220458284 is about 1068.6635085028.

The spelling of 1220458284 in words is "one billion, two hundred twenty million, four hundred fifty-eight thousand, two hundred eighty-four".