1978824 has 32 divisors (see below), whose sum is σ = 5070240. Its totient is φ = 643200.

The previous prime is 1978807. The next prime is 1978849. The reversal of 1978824 is 4288791.

It is a zygodrome in base 7.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22 + ... + 1989.

It is an arithmetic number, because the mean of its divisors is an integer number (158445).

2^1978824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2535120).

1978824 is an abundant number, since it is smaller than the sum of its proper divisors (3091416).

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

1978824 is a wasteful number, since it uses less digits than its factorization.

1978824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2057 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 1978824 is about 1406.7067924767. The cubic root of 1978824 is about 125.5458581744.

The spelling of 1978824 in words is "one million, nine hundred seventy-eight thousand, eight hundred twenty-four".