1947312372 has 12 divisors (see below), whose sum is σ = 4543728896. Its totient is φ = 649104120.

The previous prime is 1947312347. The next prime is 1947312373. The reversal of 1947312372 is 2732137491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1947312372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947312373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81138004 + ... + 81138027.

Almost surely, 2^1947312372 is an apocalyptic number.

1947312372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1947312372 is an abundant number, since it is smaller than the sum of its proper divisors (2596416524).

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

1947312372 is a wasteful number, since it uses less digits than its factorization.

1947312372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162276038 (or 162276036 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 1947312372 is about 44128.3624441243. The cubic root of 1947312372 is about 1248.7587405212.

The spelling of 1947312372 in words is "one billion, nine hundred forty-seven million, three hundred twelve thousand, three hundred seventy-two".