28066570 has 32 divisors (see below), whose sum is σ = 57921408. Its totient is φ = 9592128.

The previous prime is 28066543. The next prime is 28066579. The reversal of 28066570 is 7566082.

It is not an unprimeable number, because it can be changed into a prime (28066579) 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, 37924 + ... + 38656.

It is an arithmetic number, because the mean of its divisors is an integer number (1810044).

Almost surely, 2^28066570 is an apocalyptic number.

28066570 is an abundant number, since it is smaller than the sum of its proper divisors (29854838).

28066570 is a wasteful number, since it uses less digits than its factorization.

28066570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 28066570 is about 5297.7891615277. The cubic root of 28066570 is about 303.8993564002.

The spelling of 28066570 in words is "twenty-eight million, sixty-six thousand, five hundred seventy".