1944212140 has 48 divisors (see below), whose sum is σ = 4655562912. Its totient is φ = 675634176.

The previous prime is 1944212131. The next prime is 1944212141. The reversal of 1944212140 is 412124491.

It is a junction number, because it is equal to n+sod(n) for n = 1944212099 and 1944212108.

It is not an unprimeable number, because it can be changed into a prime (1944212141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215514 + ... + 224353.

It is an arithmetic number, because the mean of its divisors is an integer number (96990894).

Almost surely, 2^1944212140 is an apocalyptic number.

1944212140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1944212140 is an abundant number, since it is smaller than the sum of its proper divisors (2711350772).

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

1944212140 is a wasteful number, since it uses less digits than its factorization.

1944212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439906 (or 439904 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1944212140 is about 44093.2210209234. The cubic root of 1944212140 is about 1248.0956902233.

The spelling of 1944212140 in words is "one billion, nine hundred forty-four million, two hundred twelve thousand, one hundred forty".