1220001982 has 8 divisors (see below), whose sum is σ = 1830464496. Its totient is φ = 609847152.

The previous prime is 1220001973. The next prime is 1220002019. The reversal of 1220001982 is 2891000221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1220001982³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66738 + ... + 83029.

It is an arithmetic number, because the mean of its divisors is an integer number (228808062).

Almost surely, 2^1220001982 is an apocalyptic number.

1220001982 is a deficient number, since it is larger than the sum of its proper divisors (610462514).

1220001982 is a wasteful number, since it uses less digits than its factorization.

1220001982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153842.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1220001982 is about 34928.5267653819. The cubic root of 1220001982 is about 1068.5303087895.

The spelling of 1220001982 in words is "one billion, two hundred twenty million, one thousand, nine hundred eighty-two".