28380310 has 48 divisors (see below), whose sum is σ = 62938944. Its totient is φ = 9155328.

The previous prime is 28380263. The next prime is 28380343. The reversal of 28380310 is 1308382.

It is a super-2 number, since 2×28380310² = 1610883991392200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6627 + ... + 10033.

It is an arithmetic number, because the mean of its divisors is an integer number (1311228).

Almost surely, 2^28380310 is an apocalyptic number.

28380310 is an abundant number, since it is smaller than the sum of its proper divisors (34558634).

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

28380310 is a wasteful number, since it uses less digits than its factorization.

28380310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28380310 is about 5327.3173361458. The cubic root of 28380310 is about 305.0275349145.

Adding to 28380310 its reverse (1308382), we get a palindrome (29688692).

The spelling of 28380310 in words is "twenty-eight million, three hundred eighty thousand, three hundred ten".