28966690 has 16 divisors (see below), whose sum is σ = 52648128. Its totient is φ = 11473776.

The previous prime is 28966687. The next prime is 28966703. The reversal of 28966690 is 9666982.

It is a happy number.

It is a super-2 number, since 2×28966690² = 1678138259112200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28966690.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13032 + ... + 15091.

It is an arithmetic number, because the mean of its divisors is an integer number (3290508).

Almost surely, 2^28966690 is an apocalyptic number.

28966690 is a deficient number, since it is larger than the sum of its proper divisors (23681438).

28966690 is a wasteful number, since it uses less digits than its factorization.

28966690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28233.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 28966690 is about 5382.0711626659. The cubic root of 28966690 is about 307.1140066130.

The spelling of 28966690 in words is "twenty-eight million, nine hundred sixty-six thousand, six hundred ninety".