1978480284 has 24 divisors (see below), whose sum is σ = 5036131968. Its totient is φ = 599539440.

The previous prime is 1978480277. The next prime is 1978480289. The reversal of 1978480284 is 4820848791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978480289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7494112 + ... + 7494375.

It is an arithmetic number, because the mean of its divisors is an integer number (209838832).

Almost surely, 2^1978480284 is an apocalyptic number.

It is an amenable number.

1978480284 is an abundant number, since it is smaller than the sum of its proper divisors (3057651684).

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

1978480284 is a wasteful number, since it uses less digits than its factorization.

1978480284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14988505 (or 14988503 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 1978480284 is about 44480.1111059763. Note that the first 4 decimals coincide. The cubic root of 1978480284 is about 1255.3858876947.

The spelling of 1978480284 in words is "one billion, nine hundred seventy-eight million, four hundred eighty thousand, two hundred eighty-four".