1973873640 has 32 divisors (see below), whose sum is σ = 5921621280. Its totient is φ = 526366272.

The previous prime is 1973873623. The next prime is 1973873663. The reversal of 1973873640 is 463783791.

It is a self number, because there is not a number n which added to its sum of digits gives 1973873640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8224354 + ... + 8224593.

It is an arithmetic number, because the mean of its divisors is an integer number (185050665).

Almost surely, 2^1973873640 is an apocalyptic number.

1973873640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1973873640 is an abundant number, since it is smaller than the sum of its proper divisors (3947747640).

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

1973873640 is a wasteful number, since it uses less digits than its factorization.

1973873640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16448961 (or 16448957 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 1973873640 is about 44428.2977391662. The cubic root of 1973873640 is about 1254.4107941427.

The spelling of 1973873640 in words is "one billion, nine hundred seventy-three million, eight hundred seventy-three thousand, six hundred forty".