28525450 has 12 divisors (see below), whose sum is σ = 53057430. Its totient is φ = 11410160.

The previous prime is 28525429. The next prime is 28525493. The reversal of 28525450 is 5452582.

It can be written as a sum of positive squares in 3 ways, for example, as 27699169 + 826281 = 5263^2 + 909^2 .

It is a super-3 number, since 3×28525450³ (a number of 23 digits) contains 333 as substring.

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, 285205 + ... + 285304.

Almost surely, 2^28525450 is an apocalyptic number.

28525450 is a deficient number, since it is larger than the sum of its proper divisors (24531980).

28525450 is a wasteful number, since it uses less digits than its factorization.

28525450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570521 (or 570516 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 28525450 is about 5340.9222050129. The cubic root of 28525450 is about 305.5466323687.

It can be divided in two parts, 28 and 525450, that multiplied together give a triangular number (14712600 = T₅₄₂₄).

The spelling of 28525450 in words is "twenty-eight million, five hundred twenty-five thousand, four hundred fifty".