28086670 has 8 divisors (see below), whose sum is σ = 50556024. Its totient is φ = 11234664.

The previous prime is 28086659. The next prime is 28086671. The reversal of 28086670 is 7668082.

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

It is a super-2 number, since 2×28086670² = 1577722063377800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28086671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404324 + ... + 1404343.

It is an arithmetic number, because the mean of its divisors is an integer number (6319503).

Almost surely, 2^28086670 is an apocalyptic number.

28086670 is a deficient number, since it is larger than the sum of its proper divisors (22469354).

28086670 is a wasteful number, since it uses less digits than its factorization.

28086670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808674.

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

The square root of 28086670 is about 5299.6858397456. The cubic root of 28086670 is about 303.9718853847.

The spelling of 28086670 in words is "twenty-eight million, eighty-six thousand, six hundred seventy".