1620220982 has 4 divisors (see below), whose sum is σ = 2430331476. Its totient is φ = 810110490.

The previous prime is 1620220967. The next prime is 1620220997. The reversal of 1620220982 is 2890220261.

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

It is an interprime number because it is at equal distance from previous prime (1620220967) and next prime (1620220997).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405055244 + ... + 405055247.

It is an arithmetic number, because the mean of its divisors is an integer number (607582869).

Almost surely, 2^1620220982 is an apocalyptic number.

1620220982 is a deficient number, since it is larger than the sum of its proper divisors (810110494).

1620220982 is an equidigital number, since it uses as much as digits as its factorization.

1620220982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810110493.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1620220982 is about 40251.9686723519. The cubic root of 1620220982 is about 1174.5136921005.

The spelling of 1620220982 in words is "one billion, six hundred twenty million, two hundred twenty thousand, nine hundred eighty-two".