1972644 has 12 divisors (see below), whose sum is σ = 4602864. Its totient is φ = 657544.

The previous prime is 1972643. The next prime is 1972651. The reversal of 1972644 is 4462791.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1972643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82182 + ... + 82205.

It is an arithmetic number, because the mean of its divisors is an integer number (383572).

2^1972644 is an apocalyptic number.

It is an amenable number.

1972644 is an abundant number, since it is smaller than the sum of its proper divisors (2630220).

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

1972644 is a wasteful number, since it uses less digits than its factorization.

1972644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164394 (or 164392 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 1972644 is about 1404.5084549407. The cubic root of 1972644 is about 125.4150258367.

The spelling of 1972644 in words is "one million, nine hundred seventy-two thousand, six hundred forty-four".