28340625 has 24 divisors (see below), whose sum is σ = 47246976. Its totient is φ = 15110000.

The previous prime is 28340621. The next prime is 28340629. The reversal of 28340625 is 52604382.

It is an interprime number because it is at equal distance from previous prime (28340621) and next prime (28340629).

It is not a de Polignac number, because 28340625 - 2² = 28340621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28340592 and 28340601.

It is not an unprimeable number, because it can be changed into a prime (28340621) by changing a digit.

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, 7864 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (1968624).

Almost surely, 2^28340625 is an apocalyptic number.

28340625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28340625 is a deficient number, since it is larger than the sum of its proper divisors (18906351).

28340625 is an frugal number, since it uses more digits than its factorization.

28340625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051 (or 3031 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28340625 is about 5323.5913629804. The cubic root of 28340625 is about 304.8852923482.

The spelling of 28340625 in words is "twenty-eight million, three hundred forty thousand, six hundred twenty-five".