1973872920 has 128 divisors (see below), whose sum is σ = 6131220480. Its totient is φ = 507840000.

The previous prime is 1973872913. The next prime is 1973872921. The reversal of 1973872920 is 292783791.

It is a self number, because there is not a number n which added to its sum of digits gives 1973872920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973872921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1714345 + ... + 1715495.

It is an arithmetic number, because the mean of its divisors is an integer number (47900160).

Almost surely, 2^1973872920 is an apocalyptic number.

1973872920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1973872920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3065610240).

1973872920 is an abundant number, since it is smaller than the sum of its proper divisors (4157347560).

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

1973872920 is a wasteful number, since it uses less digits than its factorization.

1973872920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1973872920 is about 44428.2896362216. The cubic root of 1973872920 is about 1254.4106416210.

The spelling of 1973872920 in words is "one billion, nine hundred seventy-three million, eight hundred seventy-two thousand, nine hundred twenty".