1982002891 has 8 divisors (see below), whose sum is σ = 2183593968. Its totient is φ = 1783980000.

The previous prime is 1982002877. The next prime is 1982002921.

1982002891 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1982002891 - 2¹³ = 1981994699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1982002091) 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, 890880 + ... + 893101.

It is an arithmetic number, because the mean of its divisors is an integer number (272949246).

Almost surely, 2^1982002891 is an apocalyptic number.

1982002891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1982002891 is a deficient number, since it is larger than the sum of its proper divisors (201591077).

1982002891 is a wasteful number, since it uses less digits than its factorization.

1982002891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784093.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 1982002891 is about 44519.6910478948. The cubic root of 1982002891 is about 1256.1305011585.

The spelling of 1982002891 in words is "one billion, nine hundred eighty-two million, two thousand, eight hundred ninety-one".