1972660500 has 192 divisors, whose sum is σ = 6520550400. Its totient is φ = 514684800.

The previous prime is 1972660499. The next prime is 1972660519. The reversal of 1972660500 is 50662791.

1972660500 is a `hidden beast` number, since 1 + 97 + 2 + 6 + 60 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 632946 + ... + 636054.

It is an arithmetic number, because the mean of its divisors is an integer number (33961200).

Almost surely, 2^1972660500 is an apocalyptic number.

1972660500 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 1972660500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3260275200).

1972660500 is an abundant number, since it is smaller than the sum of its proper divisors (4547889900).

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

1972660500 is a wasteful number, since it uses less digits than its factorization.

1972660500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3166 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1972660500 is about 44414.6428557069. The cubic root of 1972660500 is about 1254.1537550991.

The spelling of 1972660500 in words is "one billion, nine hundred seventy-two million, six hundred sixty thousand, five hundred".