1820662986 has 16 divisors (see below), whose sum is σ = 3642506784. Its totient is φ = 606690864.

The previous prime is 1820662981. The next prime is 1820663029. The reversal of 1820662986 is 6892660281.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1820662981) 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, 28485 + ... + 66728.

It is an arithmetic number, because the mean of its divisors is an integer number (227656674).

Almost surely, 2^1820662986 is an apocalyptic number.

1820662986 is an abundant number, since it is smaller than the sum of its proper divisors (1821843798).

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

1820662986 is a wasteful number, since it uses less digits than its factorization.

1820662986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98405.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 1820662986 is about 42669.2276236634. The cubic root of 1820662986 is about 1221.0773843006.

The spelling of 1820662986 in words is "one billion, eight hundred twenty million, six hundred sixty-two thousand, nine hundred eighty-six".