28619825 has 24 divisors (see below), whose sum is σ = 38622528. Its totient is φ = 20911680.

The previous prime is 28619821. The next prime is 28619827. The reversal of 28619825 is 52891682.

It is not a de Polignac number, because 28619825 - 2² = 28619821 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28619821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34364 + ... + 35186.

It is an arithmetic number, because the mean of its divisors is an integer number (1609272).

Almost surely, 2^28619825 is an apocalyptic number.

28619825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28619825 is a deficient number, since it is larger than the sum of its proper divisors (10002703).

28619825 is a wasteful number, since it uses less digits than its factorization.

28619825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 948 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 28619825 is about 5349.7499941586. The cubic root of 28619825 is about 305.8832232724.

The spelling of 28619825 in words is "twenty-eight million, six hundred nineteen thousand, eight hundred twenty-five".