1620444232 has 16 divisors (see below), whose sum is σ = 3314545200. Its totient is φ = 736565520.

The previous prime is 1620444227. The next prime is 1620444251. The reversal of 1620444232 is 2324440261.

It is a self number, because there is not a number n which added to its sum of digits gives 1620444232.

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, 9206982 + ... + 9207157.

It is an arithmetic number, because the mean of its divisors is an integer number (207159075).

Almost surely, 2^1620444232 is an apocalyptic number.

It is an amenable number.

1620444232 is an abundant number, since it is smaller than the sum of its proper divisors (1694100968).

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

1620444232 is a wasteful number, since it uses less digits than its factorization.

1620444232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18414156 (or 18414152 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 1620444232 is about 40254.7417331176. The cubic root of 1620444232 is about 1174.5676349767.

Adding to 1620444232 its reverse (2324440261), we get a palindrome (3944884493).

The spelling of 1620444232 in words is "one billion, six hundred twenty million, four hundred forty-four thousand, two hundred thirty-two".