1220484500 has 24 divisors (see below), whose sum is σ = 2665539240. Its totient is φ = 488193600.

The previous prime is 1220484497. The next prime is 1220484547. The reversal of 1220484500 is 54840221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13060996 + 1207423504 = 3614^2 + 34748^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1220484500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219985 + ... + 1220984.

It is an arithmetic number, because the mean of its divisors is an integer number (111064135).

Almost surely, 2^1220484500 is an apocalyptic number.

1220484500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220484500 is an abundant number, since it is smaller than the sum of its proper divisors (1445054740).

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

1220484500 is a wasteful number, since it uses less digits than its factorization.

1220484500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440988 (or 2440976 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 1220484500 is about 34935.4333020216. The cubic root of 1220484500 is about 1068.6711602411.

The spelling of 1220484500 in words is "one billion, two hundred twenty million, four hundred eighty-four thousand, five hundred".