28057330 has 32 divisors (see below), whose sum is σ = 57966336. Its totient is φ = 9578304.

The previous prime is 28057307. The next prime is 28057343. The reversal of 28057330 is 3375082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18667 + ... + 20113.

It is an arithmetic number, because the mean of its divisors is an integer number (1811448).

Almost surely, 2^28057330 is an apocalyptic number.

28057330 is an abundant number, since it is smaller than the sum of its proper divisors (29909006).

28057330 is a wasteful number, since it uses less digits than its factorization.

28057330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 28057330 is about 5296.9170278569. The cubic root of 28057330 is about 303.8660030994.

The spelling of 28057330 in words is "twenty-eight million, fifty-seven thousand, three hundred thirty".