1986216802 has 4 divisors (see below), whose sum is σ = 2979325206. Its totient is φ = 993108400.

The previous prime is 1986216767. The next prime is 1986216829. The reversal of 1986216802 is 2086126891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1142372401 + 843844401 = 33799^2 + 29049^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496554199 + ... + 496554202.

Almost surely, 2^1986216802 is an apocalyptic number.

1986216802 is a deficient number, since it is larger than the sum of its proper divisors (993108404).

1986216802 is an equidigital number, since it uses as much as digits as its factorization.

1986216802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993108403.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1986216802 is about 44566.9922925028. The cubic root of 1986216802 is about 1257.0200853431.

The spelling of 1986216802 in words is "one billion, nine hundred eighty-six million, two hundred sixteen thousand, eight hundred two".