1981472 has 24 divisors (see below), whose sum is σ = 4107600. Its totient is φ = 938304.

The previous prime is 1981471. The next prime is 1981477. The reversal of 1981472 is 2741891.

It is a super-3 number, since 3×1981472³ = 23339152080859398144, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1981471) 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, 1022 + ... + 2237.

It is an arithmetic number, because the mean of its divisors is an integer number (171150).

2^1981472 is an apocalyptic number.

It is an amenable number.

1981472 is an abundant number, since it is smaller than the sum of its proper divisors (2126128).

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

1981472 is a wasteful number, since it uses less digits than its factorization.

1981472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288 (or 3280 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 1981472 is about 1407.6476831935. The cubic root of 1981472 is about 125.6018337190.

The spelling of 1981472 in words is "one million, nine hundred eighty-one thousand, four hundred seventy-two".