1978074784 has 96 divisors (see below), whose sum is σ = 4632477696. Its totient is φ = 813576960.

The previous prime is 1978074779. The next prime is 1978074809. The reversal of 1978074784 is 4874708791.

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, 880767 + ... + 883009.

It is an arithmetic number, because the mean of its divisors is an integer number (48254976).

Almost surely, 2^1978074784 is an apocalyptic number.

1978074784 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 1978074784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2316238848).

1978074784 is an abundant number, since it is smaller than the sum of its proper divisors (2654402912).

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

1978074784 is a wasteful number, since it uses less digits than its factorization.

1978074784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 55.

The square root of 1978074784 is about 44475.5526553634. The cubic root of 1978074784 is about 1255.3001158418.

The spelling of 1978074784 in words is "one billion, nine hundred seventy-eight million, seventy-four thousand, seven hundred eighty-four".