28151025 has 72 divisors (see below), whose sum is σ = 56335680. Its totient is φ = 12136320.

The previous prime is 28150999. The next prime is 28151029. The reversal of 28151025 is 52015182.

28151025 = T₁₀₄ + T₁₀₅ + ... + T₅₅₃.

It is not a de Polignac number, because 28151025 - 2⁶ = 28150961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28150986 and 28151004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28151029) 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, 654654 + ... + 654696.

It is an arithmetic number, because the mean of its divisors is an integer number (782440).

Almost surely, 2^28151025 is an apocalyptic number.

28151025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28151025 is an abundant number, since it is smaller than the sum of its proper divisors (28184655).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28151025 is a wasteful number, since it uses less digits than its factorization.

28151025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 28151025 is about 5305.7539520788. The cubic root of 28151025 is about 304.2038719319.

The spelling of 28151025 in words is "twenty-eight million, one hundred fifty-one thousand, twenty-five".