28250310 has 32 divisors (see below), whose sum is σ = 73965312. Its totient is φ = 6848480.

The previous prime is 28250303. The next prime is 28250323. The reversal of 28250310 is 1305282.

28250310 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×28250310² = 1596160030192200, which contains 22 as substring.

It is a congruent number.

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, 42474 + ... + 43133.

It is an arithmetic number, because the mean of its divisors is an integer number (2311416).

Almost surely, 2^28250310 is an apocalyptic number.

28250310 is an abundant number, since it is smaller than the sum of its proper divisors (45715002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28250310 is a wasteful number, since it uses less digits than its factorization.

28250310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85628.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 28250310 is about 5315.1020686342. The cubic root of 28250310 is about 304.5610814666.

Adding to 28250310 its reverse (1305282), we get a palindrome (29555592).

The spelling of 28250310 in words is "twenty-eight million, two hundred fifty thousand, three hundred ten".