1939121472 has 28 divisors (see below), whose sum is σ = 5130592736. Its totient is φ = 646373760.

The previous prime is 1939121461. The next prime is 1939121477. The reversal of 1939121472 is 2741219391.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1939121472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939121477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5049604 + ... + 5049987.

Almost surely, 2^1939121472 is an apocalyptic number.

1939121472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1939121472 is an abundant number, since it is smaller than the sum of its proper divisors (3191471264).

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

1939121472 is a wasteful number, since it uses less digits than its factorization.

1939121472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099606 (or 10099596 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 1939121472 is about 44035.4569863877. The cubic root of 1939121472 is about 1247.0054123782.

The spelling of 1939121472 in words is "one billion, nine hundred thirty-nine million, one hundred twenty-one thousand, four hundred seventy-two".