28901925 has 72 divisors (see below), whose sum is σ = 57345288. Its totient is φ = 13824000.

The previous prime is 28901923. The next prime is 28901947. The reversal of 28901925 is 52910982.

28901925 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 12 ways, for example, as 17164449 + 11737476 = 4143^2 + 3426^2 .

It is not a de Polignac number, because 28901925 - 2¹ = 28901923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28901925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28901923) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 119805 + ... + 120045.

Almost surely, 2^28901925 is an apocalyptic number.

28901925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28901925 is a deficient number, since it is larger than the sum of its proper divisors (28443363).

28901925 is a wasteful number, since it uses less digits than its factorization.

28901925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 28901925 is about 5376.0510600254. The cubic root of 28901925 is about 306.8849494799.

The spelling of 28901925 in words is "twenty-eight million, nine hundred one thousand, nine hundred twenty-five".