28857590 has 16 divisors (see below), whose sum is σ = 53619840. Its totient is φ = 11170560.

The previous prime is 28857589. The next prime is 28857593. The reversal of 28857590 is 9575882.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46235 + ... + 46854.

It is an arithmetic number, because the mean of its divisors is an integer number (3351240).

Almost surely, 2^28857590 is an apocalyptic number.

28857590 is a deficient number, since it is larger than the sum of its proper divisors (24762250).

28857590 is a wasteful number, since it uses less digits than its factorization.

28857590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93127.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 28857590 is about 5371.9260977791. The cubic root of 28857590 is about 306.7279506277.

It can be divided in two parts, 288 and 57590, that multiplied together give a triangular number (16585920 = T₅₇₅₉).

The spelling of 28857590 in words is "twenty-eight million, eight hundred fifty-seven thousand, five hundred ninety".