1944428820 has 24 divisors (see below), whose sum is σ = 5444400864. Its totient is φ = 518514336.

The previous prime is 1944428797. The next prime is 1944428831. The reversal of 1944428820 is 288244491.

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, 16203514 + ... + 16203633.

It is an arithmetic number, because the mean of its divisors is an integer number (226850036).

Almost surely, 2^1944428820 is an apocalyptic number.

1944428820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1944428820 is an abundant number, since it is smaller than the sum of its proper divisors (3499972044).

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

1944428820 is a wasteful number, since it uses less digits than its factorization.

1944428820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32407159 (or 32407157 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 1944428820 is about 44095.6780195066. The cubic root of 1944428820 is about 1248.1420547331.

The spelling of 1944428820 in words is "one billion, nine hundred forty-four million, four hundred twenty-eight thousand, eight hundred twenty".