1220431450 has 48 divisors (see below), whose sum is σ = 2605886784. Its totient is φ = 416563200.

The previous prime is 1220431439. The next prime is 1220431463. The reversal of 1220431450 is 541340221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71770 + ... + 87130.

It is an arithmetic number, because the mean of its divisors is an integer number (54289308).

Almost surely, 2^1220431450 is an apocalyptic number.

1220431450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220431450 is an abundant number, since it is smaller than the sum of its proper divisors (1385455334).

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

1220431450 is a wasteful number, since it uses less digits than its factorization.

1220431450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15607 (or 15602 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1220431450 is about 34934.6740359775. The cubic root of 1220431450 is about 1068.6556762737.

Adding to 1220431450 its reverse (541340221), we get a palindrome (1761771671).

The spelling of 1220431450 in words is "one billion, two hundred twenty million, four hundred thirty-one thousand, four hundred fifty".