28425897 has 14 divisors (see below), whose sum is σ = 42620442. Its totient is φ = 18950112.

The previous prime is 28425883. The next prime is 28425959. The reversal of 28425897 is 79852482.

28425897 is a `hidden beast` number, since 28 + 42 + 589 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21566736 + 6859161 = 4644^2 + 2619^2 .

It is not a de Polignac number, because 28425897 - 2¹⁰ = 28424873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28425847) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 18768 + ... + 20225.

Almost surely, 2^28425897 is an apocalyptic number.

28425897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28425897 is a deficient number, since it is larger than the sum of its proper divisors (14194545).

28425897 is an frugal number, since it uses more digits than its factorization.

28425897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39011 (or 38996 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28425897 is about 5331.5942268706. The cubic root of 28425897 is about 305.1907684094.

It can be divided in two parts, 2842589 and 7, that added together give a square (2842596 = 1686²).

The spelling of 28425897 in words is "twenty-eight million, four hundred twenty-five thousand, eight hundred ninety-seven".