28283690 has 16 divisors (see below), whose sum is σ = 51020928. Its totient is φ = 11288976.

The previous prime is 28283683. The next prime is 28283693. The reversal of 28283690 is 9638282.

It is a happy number.

It is a super-2 number, since 2×28283690² = 1599934240032200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28283693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2219 + ... + 7841.

It is an arithmetic number, because the mean of its divisors is an integer number (3188808).

Almost surely, 2^28283690 is an apocalyptic number.

28283690 is a deficient number, since it is larger than the sum of its proper divisors (22737238).

28283690 is a wasteful number, since it uses less digits than its factorization.

28283690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28283690 is about 5318.2412506392. The cubic root of 28283690 is about 304.6809886752.

The spelling of 28283690 in words is "twenty-eight million, two hundred eighty-three thousand, six hundred ninety".