28535481 has 36 divisors (see below), whose sum is σ = 45419868. Its totient is φ = 17252352.

The previous prime is 28535471. The next prime is 28535513. The reversal of 28535481 is 18453582.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19881 + 28515600 = 141^2 + 5340^2 .

It is not a de Polignac number, because 28535481 - 2¹¹ = 28533433 is a prime.

It is a super-2 number, since 2×28535481² = 1628547351802722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28535411) 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, 110905 + ... + 111161.

It is an arithmetic number, because the mean of its divisors is an integer number (1261663).

Almost surely, 2^28535481 is an apocalyptic number.

It is an amenable number.

28535481 is a deficient number, since it is larger than the sum of its proper divisors (16884387).

28535481 is a wasteful number, since it uses less digits than its factorization.

28535481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 346 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 28535481 is about 5341.8611925058. The cubic root of 28535481 is about 305.5824434202.

The spelling of 28535481 in words is "twenty-eight million, five hundred thirty-five thousand, four hundred eighty-one".