1979712 has 84 divisors (see below), whose sum is σ = 6498336. Its totient is φ = 564480.

The previous prime is 1979689. The next prime is 1979713. The reversal of 1979712 is 2179791.

It is a tau number, because it is divible by the number of its divisors (84).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3787 + ... + 4277.

2^1979712 is an apocalyptic number.

1979712 is a gapful number since it is divisible by the number (12) 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 1979712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3249168).

1979712 is an abundant number, since it is smaller than the sum of its proper divisors (4518624).

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

1979712 is a wasteful number, since it uses less digits than its factorization.

1979712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 503 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1979712 is about 1407.0223878816. The cubic root of 1979712 is about 125.5646349917.

The spelling of 1979712 in words is "one million, nine hundred seventy-nine thousand, seven hundred twelve".