1982172972 has 24 divisors (see below), whose sum is σ = 4980845296. Its totient is φ = 609899328.

The previous prime is 1982172961. The next prime is 1982172977. The reversal of 1982172972 is 2792712891.

It is a happy number.

1982172972 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1982172977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6352963 + ... + 6353274.

Almost surely, 2^1982172972 is an apocalyptic number.

1982172972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1982172972 is an abundant number, since it is smaller than the sum of its proper divisors (2998672324).

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

1982172972 is a wasteful number, since it uses less digits than its factorization.

1982172972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12706257 (or 12706255 counting only the distinct ones).

The product of its digits is 254016, while the sum is 48.

The square root of 1982172972 is about 44521.6011841443. The cubic root of 1982172972 is about 1256.1664307766.

The spelling of 1982172972 in words is "one billion, nine hundred eighty-two million, one hundred seventy-two thousand, nine hundred seventy-two".