28881662 has 4 divisors (see below), whose sum is σ = 43322496. Its totient is φ = 14440830.

The previous prime is 28881659. The next prime is 28881673. The reversal of 28881662 is 26618882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26618882 = 2 ⋅13309441.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7220414 + ... + 7220417.

It is an arithmetic number, because the mean of its divisors is an integer number (10830624).

Almost surely, 2^28881662 is an apocalyptic number.

28881662 is a deficient number, since it is larger than the sum of its proper divisors (14440834).

28881662 is a wasteful number, since it uses less digits than its factorization.

28881662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14440833.

The product of its digits is 73728, while the sum is 41.

The square root of 28881662 is about 5374.1661678813. The cubic root of 28881662 is about 306.8132141943.

The spelling of 28881662 in words is "twenty-eight million, eight hundred eighty-one thousand, six hundred sixty-two".