28069490 has 16 divisors (see below), whose sum is σ = 51166080. Its totient is φ = 11085360.

The previous prime is 28069487. The next prime is 28069493. The reversal of 28069490 is 9496082.

It is an interprime number because it is at equal distance from previous prime (28069487) and next prime (28069493).

It is not an unprimeable number, because it can be changed into a prime (28069493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16976 + ... + 18555.

It is an arithmetic number, because the mean of its divisors is an integer number (3197880).

Almost surely, 2^28069490 is an apocalyptic number.

28069490 is a deficient number, since it is larger than the sum of its proper divisors (23096590).

28069490 is a wasteful number, since it uses less digits than its factorization.

28069490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35617.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28069490 is about 5298.0647410163. The cubic root of 28069490 is about 303.9098950986.

The spelling of 28069490 in words is "twenty-eight million, sixty-nine thousand, four hundred ninety".