1978292484 has 135 divisors (see below), whose sum is σ = 6033088677. Its totient is φ = 563625216.

The previous prime is 1978292453. The next prime is 1978292489. The reversal of 1978292484 is 4842928791.

The square root of 1978292484 is 44478.

It is a perfect power (a square), and thus also a powerful number.

1978292484 is a `hidden beast` number, since 1 + 9 + 78 + 2 + 92 + 484 = 666.

It can be written as a sum of positive squares in only one way, i.e., 803722500 + 1174569984 = 28350^2 + 34272^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1978292484.

It is not an unprimeable number, because it can be changed into a prime (1978292489) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 5604052 + ... + 5604404.

Almost surely, 2^1978292484 is an apocalyptic number.

1978292484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1978292484 is the 44478-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978292484

1978292484 is an abundant number, since it is smaller than the sum of its proper divisors (4054796193).

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

1978292484 is an equidigital number, since it uses as much as digits as its factorization.

1978292484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 365 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The cubic root of 1978292484 is about 1255.3461654675.

The spelling of 1978292484 in words is "one billion, nine hundred seventy-eight million, two hundred ninety-two thousand, four hundred eighty-four".