1982214978 has 16 divisors (see below), whose sum is σ = 3972016416. Its totient is φ = 659473920.

The previous prime is 1982214973. The next prime is 1982214979. The reversal of 1982214978 is 8794122891.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1982214978.

It is not an unprimeable number, because it can be changed into a prime (1982214973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312703 + ... + 318978.

It is an arithmetic number, because the mean of its divisors is an integer number (248251026).

Almost surely, 2^1982214978 is an apocalyptic number.

1982214978 is an abundant number, since it is smaller than the sum of its proper divisors (1989801438).

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

1982214978 is a wasteful number, since it uses less digits than its factorization.

1982214978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632209.

The product of its digits is 580608, while the sum is 51.

The square root of 1982214978 is about 44522.0729301770. The cubic root of 1982214978 is about 1256.1753042293.

The spelling of 1982214978 in words is "one billion, nine hundred eighty-two million, two hundred fourteen thousand, nine hundred seventy-eight".