28520270 has 8 divisors (see below), whose sum is σ = 51336504. Its totient is φ = 11408104.

The previous prime is 28520269. The next prime is 28520287. The reversal of 28520270 is 7202582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426004 + ... + 1426023.

It is an arithmetic number, because the mean of its divisors is an integer number (6417063).

Almost surely, 2^28520270 is an apocalyptic number.

28520270 is a deficient number, since it is larger than the sum of its proper divisors (22816234).

28520270 is a wasteful number, since it uses less digits than its factorization.

28520270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852034.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 28520270 is about 5340.4372480163. The cubic root of 28520270 is about 305.5281362846.

The spelling of 28520270 in words is "twenty-eight million, five hundred twenty thousand, two hundred seventy".