1990270882 has 4 divisors (see below), whose sum is σ = 2985406326. Its totient is φ = 995135440.

The previous prime is 1990270873. The next prime is 1990270901. The reversal of 1990270882 is 2880720991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2880720991 = 32119 ⋅89689.

It can be written as a sum of positive squares in only one way, i.e., 1499160961 + 491109921 = 38719^2 + 22161^2 .

It is a super-2 number, since 2×1990270882² = 7922356367474115848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497567719 + ... + 497567722.

Almost surely, 2^1990270882 is an apocalyptic number.

1990270882 is a deficient number, since it is larger than the sum of its proper divisors (995135444).

1990270882 is an equidigital number, since it uses as much as digits as its factorization.

1990270882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995135443.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 1990270882 is about 44612.4520957994. The cubic root of 1990270882 is about 1257.8747414089.

The spelling of 1990270882 in words is "one billion, nine hundred ninety million, two hundred seventy thousand, eight hundred eighty-two".