28293530 has 32 divisors (see below), whose sum is σ = 53450496. Its totient is φ = 10770624.

The previous prime is 28293521. The next prime is 28293533. The reversal of 28293530 is 3539282.

It is not an unprimeable number, because it can be changed into a prime (28293533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16577 + ... + 18203.

It is an arithmetic number, because the mean of its divisors is an integer number (1670328).

Almost surely, 2^28293530 is an apocalyptic number.

28293530 is a deficient number, since it is larger than the sum of its proper divisors (25156966).

28293530 is a wasteful number, since it uses less digits than its factorization.

28293530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 28293530 is about 5319.1662880568. The cubic root of 28293530 is about 304.7163177915.

The spelling of 28293530 in words is "twenty-eight million, two hundred ninety-three thousand, five hundred thirty".