87020866 has 8 divisors (see below), whose sum is σ = 132369984. Its totient is φ = 42897540.

The previous prime is 87020849. The next prime is 87020887. The reversal of 87020866 is 66802078.

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

It is a super-2 number, since 2×87020866² = 15145262238779912, which contains 22 as substring.

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, 306270 + ... + 306553.

It is an arithmetic number, because the mean of its divisors is an integer number (16546248).

Almost surely, 2^87020866 is an apocalyptic number.

87020866 is a deficient number, since it is larger than the sum of its proper divisors (45349118).

87020866 is a wasteful number, since it uses less digits than its factorization.

87020866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612896.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 87020866 is about 9328.4975210374. The cubic root of 87020866 is about 443.1401839506.

It can be divided in two parts, 870 and 20866, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 87020866 in words is "eighty-seven million, twenty thousand, eight hundred sixty-six".