28599425 has 6 divisors (see below), whose sum is σ = 35463318. Its totient is φ = 22879520.

The previous prime is 28599401. The next prime is 28599433. The reversal of 28599425 is 52499582.

It can be written as a sum of positive squares in 3 ways, for example, as 7595536 + 21003889 = 2756^2 + 4583^2 .

It is not a de Polignac number, because 28599425 - 2⁸ = 28599169 is a prime.

It is a super-2 number, since 2×28599425² = 1635854220661250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 571964 + ... + 572013.

It is an arithmetic number, because the mean of its divisors is an integer number (5910553).

Almost surely, 2^28599425 is an apocalyptic number.

28599425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28599425 is a deficient number, since it is larger than the sum of its proper divisors (6863893).

28599425 is a wasteful number, since it uses less digits than its factorization.

28599425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143987 (or 1143982 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 28599425 is about 5347.8430231262. The cubic root of 28599425 is about 305.8105288965.

The spelling of 28599425 in words is "twenty-eight million, five hundred ninety-nine thousand, four hundred twenty-five".