1949987540928 has 112 divisors (see below), whose sum is σ = 5901674215424. Its totient is φ = 556640087040.

The previous prime is 1949987540911. The next prime is 1949987540951. The reversal of 1949987540928 is 8290457899491.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 1949987540928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 851793 + ... + 2150703.

Almost surely, 2^{1949987540928} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1949987540928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2950837107712).

1949987540928 is an abundant number, since it is smaller than the sum of its proper divisors (3951686674496).

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

1949987540928 is a wasteful number, since it uses less digits than its factorization.

1949987540928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300050 (or 1300040 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 75.

The spelling of 1949987540928 in words is "one trillion, nine hundred forty-nine billion, nine hundred eighty-seven million, five hundred forty thousand, nine hundred twenty-eight".