28503135 has 96 divisors (see below), whose sum is σ = 57620160. Its totient is φ = 12939264.

The previous prime is 28503131. The next prime is 28503161. The reversal of 28503135 is 53130582.

28503135 = T₄₅₀ + T₄₅₁ + ... + T₆₃₉.

28503135 is a `hidden beast` number, since 28 + 503 + 135 = 666.

It is not a de Polignac number, because 28503135 - 2² = 28503131 is a prime.

28503135 is a modest number, since divided by 3135 gives 2850 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28503099 and 28503108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28503131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 537769 + ... + 537821.

It is an arithmetic number, because the mean of its divisors is an integer number (600210).

Almost surely, 2^28503135 is an apocalyptic number.

28503135 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28503135 is a wasteful number, since it uses less digits than its factorization.

28503135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 28503135 is about 5338.8327375935. The cubic root of 28503135 is about 305.4669368475.

The spelling of 28503135 in words is "twenty-eight million, five hundred three thousand, one hundred thirty-five".