1978224584 has 64 divisors (see below), whose sum is σ = 4499712000. Its totient is φ = 795930624.

The previous prime is 1978224557. The next prime is 1978224593. The reversal of 1978224584 is 4854228791.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409817 + ... + 414615.

It is an arithmetic number, because the mean of its divisors is an integer number (70308000).

Almost surely, 2^1978224584 is an apocalyptic number.

1978224584 is a gapful number since it is divisible by the number (14) 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 1978224584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249856000).

1978224584 is an abundant number, since it is smaller than the sum of its proper divisors (2521487416).

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

1978224584 is a wasteful number, since it uses less digits than its factorization.

1978224584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262 (or 5258 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 50.

The square root of 1978224584 is about 44477.2366947408. The cubic root of 1978224584 is about 1255.3318030851.

The spelling of 1978224584 in words is "one billion, nine hundred seventy-eight million, two hundred twenty-four thousand, five hundred eighty-four".