1220451040 has 24 divisors (see below), whose sum is σ = 2883315960. Its totient is φ = 488180352.

The previous prime is 1220450999. The next prime is 1220451053. The reversal of 1220451040 is 401540221.

It is a junction number, because it is equal to n+sod(n) for n = 1220450999 and 1220451017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3813750 + ... + 3814069.

It is an arithmetic number, because the mean of its divisors is an integer number (120138165).

Almost surely, 2^1220451040 is an apocalyptic number.

1220451040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220451040 is an abundant number, since it is smaller than the sum of its proper divisors (1662864920).

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

1220451040 is an equidigital number, since it uses as much as digits as its factorization.

1220451040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7627834 (or 7627826 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1220451040 is about 34934.9544153130. The cubic root of 1220451040 is about 1068.6613941567.

Adding to 1220451040 its reverse (401540221), we get a palindrome (1621991261).

The spelling of 1220451040 in words is "one billion, two hundred twenty million, four hundred fifty-one thousand, forty".