1982778264 has 40 divisors (see below), whose sum is σ = 5553616860. Its totient is φ = 660925872.

The previous prime is 1982778263. The next prime is 1982778349. The reversal of 1982778264 is 4628772891.

It is a happy number.

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 1982778264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982778263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1529274 + ... + 1530569.

Almost surely, 2^1982778264 is an apocalyptic number.

It is an amenable number.

1982778264 is an abundant number, since it is smaller than the sum of its proper divisors (3570838596).

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

1982778264 is a wasteful number, since it uses less digits than its factorization.

1982778264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059861 (or 3059848 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1982778264 is about 44528.3983992238. The cubic root of 1982778264 is about 1256.2942820657.

The spelling of 1982778264 in words is "one billion, nine hundred eighty-two million, seven hundred seventy-eight thousand, two hundred sixty-four".