28210725 has 36 divisors (see below), whose sum is σ = 53196000. Its totient is φ = 14251680.

The previous prime is 28210711. The next prime is 28210727. The reversal of 28210725 is 52701282.

It is not a de Polignac number, because 28210725 - 2⁶ = 28210661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28210727) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 976 + ... + 7574.

Almost surely, 2^28210725 is an apocalyptic number.

28210725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28210725 is a deficient number, since it is larger than the sum of its proper divisors (24985275).

28210725 is a wasteful number, since it uses less digits than its factorization.

28210725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6634 (or 6626 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28210725 is about 5311.3769401164. The cubic root of 28210725 is about 304.4187622511.

The spelling of 28210725 in words is "twenty-eight million, two hundred ten thousand, seven hundred twenty-five".